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Khan Shaykhun chemical attack

The Khan Shaykhun chemical attack took place on 4 April 2017 on the town of Khan Shaykhun in the Idlib Governorate of Syria.[6] The town was reported to have been struck by an airstrike by government forces followed by massive civilian chemical poisoning.[5][7] The release of a toxic gas, which included sarin, or a similar substance,[8] killed at least 89 people and injured more than 541, according to the opposition Idlib Health Directorate.[9][4][10] The attack was the deadliest use of chemical weapons in the Syrian civil war since the Ghouta chemical attack in 2013.[11]

2017 Khan Shaykhun chemical attack

Airstrike, sarin attack

4 April 2017 (2017-04-04)
06:30 EEST[1] (UTC+03:00)

89–100+[4] killed
300–541[4][5] injured

The OPCW-UN Joint Investigative Mechanism attributed the responsibility of the attack to the Syrian government.[12][13][14][15] The OPCW-UN JIM described chemicals that it said linked the sarin used to the Syrian government: "The samples from Khan Shaykhun contain the three types of marker chemicals described above: PF6 [HFP], isopropyl phosphates and isopropyl phosphorofluoridates. Their presence is a strong indicator that the sarin disseminated in Khan Shaykhun was produced from DF from the Syrian Arab Republic stockpile."[16][17]


The governments of the United States, United Kingdom, Turkey, Saudi Arabia, France, and Israel as well as Human Rights Watch attributed the attack to the forces of Syrian President Bashar al-Assad.[18][19][20][21] The Syrian government said the attack was a "fabrication"[22] while the Russian government said that the incident was staged.[23]


On 7 April, the United States launched 59 cruise missiles at Shayrat Air Base, which U.S. intelligence cited as the source of the attack.[24][25]

Claims by the Syrian government, Syrian opposition and Russian government

Syrian opposition claims

According to the Idlib Media Centre, the chemical agent had the characteristics of sarin. The National Coalition for Syrian Revolutionary and Opposition Forces accused the Syrian government and the Syrian Armed Forces of carrying out the attack and called for an immediate investigation by the United Nations Security Council.[5] The opposition groups said the Syrian air force dropped chemical bombs on a civilian population.[26][77]

Syrian government claims

On the day of the attack, a Syrian government official told Reuters "the government does not and has not used chemical weapons, not in the past and not in the future."[78] Later, the Russian Ministry of Defence reiterated the statement made by the Syrian Armed Forces, and said the attack on the ammunition depot took place between 11:30 and 12:30 EEST.[79]


In a 13 April interview to AFP, President Assad said the attack is "100 per cent fabrication" by the United States "working hand-in-glove with the terrorists", intended to provide a pretext for the airstrike on the Shayrat Airbase.[80][22]

Russian government claims

The Russian government denied involvement in the chemical attack; Russia's Defence Ministry issued a statement saying the Russian Air Force had "not carried out any strikes near Khan Shaykhun of Idlib province",[81] but said a Syrian aircraft did conduct an airstrike on a warehouse containing ammunition and equipment belonging to rebels near Khan Shaykhun, "yesterday, from 11:30 a.m. to 12:30 p.m".[70] The Russian Foreign Ministry said it was "premature to accuse the Syrian government of using chemical weapons in Idlib", and insist on full and impartial investigation.[74][82] Shortly after the attack Russian presidential spokesman Dmitry Peskov told reporters the use of chemical weapons is a "dangerous and monstrous crime" and that Russia's support for Assad is not "unconditional". He also said he doubted information was based on "objective materials or evidence", and that only Syrian government can resist "terrorists on the ground."[83] Mikhail Ulyanov, head of the Russian delegation to UNGA First Committee and Director of the Department for Non-Proliferation and Arms Control of the MFA of Russia, stated on the sidelines of the 72nd session of the UN General Assembly that Russia tended to 'more and more to opt for that version' that explained the event as a staged incident, and to doubt that it was the result of an air bomb strike. [84]


Later, President Vladimir Putin said the attack could be a provocation, but that several versions were possible, and the UN should investigate the attack.[85][86] On 11 April, Putin suggested the chemical attack was a false flag operation intended to discredit the Syrian government.[23]


UK based Bellingcat founder Eliot Higgins observed that Russian claims that a warehouse containing chemical weapons was bombed related to a raid carried out "two to three hours" after the first images of victims appeared. A statement made on the day of the attack by Major General Igor Konashenkov, a spokesperson for the Russian Ministry of Defence was also criticised by Higgins' Bellingcat colleague Dan Kaszeta, a veteran of the US Army Reserve's Chemical Corps, who called it "an infantile argument", and by the anti-Kremlin Russian non-profit Conflict Intelligence Team.[87][88]

United States reaction

Responsibility assessment

According to the US government, the Syrian government under Assad was behind the chemical attack,[42] and Syrian jets carried out the bombing of a rebel stronghold.[82] U.S. Secretary of State Rex Tillerson was quoted as saying "Either Russia has been complicit or Russia has been simply incompetent".[89] According to Tillerson, the U.S. appealed to Assad to cease the use of chemical weapons, and "[o]ther than that, there is no change to our military posture",[90] with ISIS remaining the primary priority.[91][92]


President Donald Trump called the attack "reprehensible" and attributed it to the Syrian government, saying the act could not be ignored "by the civilized world" during his meeting with King Abdullah II of Jordan.[93][94][95] Trump also blamed the attack on supposed failures of the administration of his predecessor, Barack Obama.[95][96] U.S. Secretary of State Rex Tillerson said: "Anyone who uses chemical weapons to attack his own people shows a fundamental disregard for human decency and must be held accountable."[95][97] US representative to the UN Nikki Haley has stated that, though before the chemical attack the US had not considered overthrowing Syrian President Bashar al-Assad from power a top US priority, it is now prominent among US priorities in the region.[91] At the UN Security Council, Haley said "When the United Nations consistently fails in its duty to act collectively, there are times in the life of states that we are compelled to take our own action",[98] by it implying if the UN failed to hold Assad accountable for the use of chemical weapons on civilians, the US will.[99] CIA Director Mike Pompeo confirmed on Thursday 13 April that his agency concluded the Syrian government was responsible for the chemical attack in Khan Shaykhun. “We were good and fast,” Pompeo said.[100] The top Democrat on the house intelligence committee, Rep. Adam Schiff, agreed that the Syrian government was responsible for the attack.[101][102]


A few members of Congress and former officials expressed skepticism, like Democratic Congresswoman Tulsi Gabbard,[103] Republican Congressman Thomas Massie,[104] and former Republican Congressman Ron Paul.[105]

International reactions

Supranational and non-governmental organizations

Secretary-General António Guterres said he was "deeply disturbed" by reports of the Idlib chemical attack, noting that the use of chemical weapons is banned under international law.[110] Federica Mogherini, the European Union's diplomatic chief, called the attack "awful" and said Bashar al-Assad's government bore "primary responsibility" for it.[111]


The Organisation for the Prohibition of Chemical Weapons (OPCW) expressed "serious concern" and said its Fact-Finding Mission in Syria was "gathering and analysing information from all available sources."[112] The following day, the Technical Secretariat of the OPCW, referring to the media reports, requested all member states of the Chemical Weapons Convention to share available information on what it described preliminary as "allegations of use of chemical weapons in the Khan Shaykhun area of Idlib province in the Syrian Arab Republic."[113] Amnesty International said the evidence points to an "air-launched chemical attack",[114] while the World Health Organization said victims carried the signs of exposure to nerve agents.[114] On 26 October, an investigative panel created by the UN Security Council said it was "confident" that Assad's air force was behind the chemical attack. Further, that the attack was possible because it drew from old Syrian stockpiles that Assad had vowed to destroy in 2013, indicating that Damascus has systematically cheated international inspectors for the past four years.[84][12][14][13]

UN Security Council countries

France called for an emergency meeting of the United Nations Security Council after the attack.[115][116] France, Britain, and the United States (who are among the permanent members of the Security Council), circulated a draft to the council's 15 members condemning the attack in Syria and demanding a full investigation into it. The emergency closed-door meeting was set on 5 April in New York.[117][118] United States Ambassador to the United Nations Nikki Haley, serving as president of the Security Council for the month, announced there would not be a vote on a draft resolution to respond to the chemical weapons attack, but instead of one resolution by the U.S. and a second resolution by Russia, there was a third resolution unexpectedly submitted by Sweden and nine other non-permanent members. When the council concluded its meeting without conclusion on the morning of 6 April, the U.S. launched a missile strike.[119] On 12 April, the proposed draft resolution was vetoed by Russia as it attributed blame to the Syrian government before any investigation had been undertaken. This was the eighth time that Russia vetoed a Security Council resolution on Syria.[120][121] Instead, on 20 April, Russia and Iran formally proposed to start an OPCW investigation (which was rejected as an investigation is already in progress)[122] and then on 26 April blocked UN resolution calling Syria to disclose information for the first OPCW investigation[123] at the same accusing UN of "blocking independent international investigation" earlier proposed by Russia and Iran.[124]


On 26 April 2017, French Foreign Minister Jean-Marc Ayrault said France had concluded that the Syrian government was "unquestionably" the perpetrator of the attack.[125][126] He added that the same mixture of sarin and hexamine had been used in the 2013 Saraqib chemical attack.[125]


United Kingdom government defense minister, Michael Fallon said he believed the Syrian air force responsible for the attack. Opposition leader Jeremy Corbyn said "There should now be an immediate ceasefire and a UN-led investigation rapidly into what is a horrific and totally illegal action by somebody using chemical weapons against innocent people."[127]


The Egyptian Foreign Ministry released a statement saying the "painful and unacceptable" images of the massacre reaffirm the necessity of reaching a political solution to end the crisis in Syria, in light of the international community decisions and Security Council Resolution 2254, as well as the Geneva Conventions.[128]

Other countries

Iranian President Hassan Rouhani called for an "impartial international fact-finding body" to be set up to investigate the attack.[129] Foreign minister Mohammad Javad Zarif described the incident as "very painful" and condemned it, but also criticized US for attacking the Syrian airbase "without doing investigation".[130] Iranian Foreign ministry spokesman Bahram Ghassemi condemned "all use of chemical weapons," but suggested the blame for the attack lay with "terrorist groups" rather than the Syrian government.[131]


Canadian Prime Minister Justin Trudeau said: "There are continuing questions ... about who is responsible for these horrible attacks against civilians, and that's why I'm impressing on the UN Security Council to pass a strong resolution that allows the international community to determine first of all who was responsible for these attacks and how we will move forward."[132] Israeli Prime Minister Benjamin Netanyahu called on the international community "to fulfill its obligation from 2013 to fully and finally remove these horrible weapons from Syria".[133] Other countries who condemned the chemical attack include the Czech Republic,[134] Italy,[135] Pakistan,[136] Saudi Arabia,[137] Switzerland,[138] United Kingdom,[117] and the Vatican City.[139]


The Iraqi government condemned the chemical attack and called for an "initiative aimed at punishing those responsible". The next day, Iraqi cleric Muqtada al-Sadr also condemned the attacks and called for President Assad to step down.[140] Australian Prime Minister Malcolm Turnbull said if al-Assad was found to be behind the attack, as the United States believe, it represented "a shocking war crime."[141] Other countries who accused Assad for responsibility include Qatar[142] and Turkey.[143][144]

Other views

Former head of the International Atomic Energy Agency (IAEA), Hans Blix, described the US retaliation as "measured" and specific,[145] but later criticized the rapid American military response.[146] He initially raised concern that the responsibility of the Syrian government was not yet proven,[145] but stated on 11 April 2017, "On balance it seems probable that the attack with gas was undertaken by the Syrian government air force," adding that "the factual circumstances known so far do not point to the rebels as arranging the gas action".[146]


Other people who have expressed skepticism of the Syrian government being responsible for the attack include former UN weapons inspector Scott Ritter,[26][147]  US based weapons expert and MIT professor emeritus Theodore Postol,[148][149] former UK ambassador to Syria and director of the British Syrian Society Peter Ford,[150][151] investigative Israeli journalist Uri Avneri,[152] and investigative journalist Seymour Hersh.[149][153][154] The OPCW-UN JIM report found no merit in any of these views and concluded that the sarin used in the attack bore the Syrian government's signature; "the Leadership Panel is confident that the Syrian Arab Republic is responsible for the release of sarin at Khan Shaykhun on 4 April 2017".[84][155]


In 2019, the Princeton University-linked journal Science & Global Security, on whose editorial board Ted Postol sat,[156] intended to publish a paper titled "Computational Forensic Analysis for the Chemical Weapons Attack at Khan Sheikhoun on 4 April 2017" written by Goong Chen, Cong Gu, Postol, Alexey Sergeev, Sanyang Liu, Pengfei Yao and Marlan O. Scully. The article questioned the findings of the UN/OPCW investigation which concluded that the Syrian government had used sarin.[157] The report's arguments were rebutted in a Bellingcat article that detailed inconsistencies and anomalies in the report's analysis.[158] In response to the Bellingcat article, the editors of Science & Global Security said “Regrettably, the Bellingcat group blog post contains a number of incorrect statements about the contents and conclusions of the paper to be published. Some of the statements appear to refer to an earlier manuscript and do not take account of all the changes made during the peer review and editorial process managed by this journal”.[157] The journal later decided not to publish the paper.[157][159]

List of massacres during the Syrian Civil War

Syria and weapons of mass destruction

Use of chemical weapons in the Syrian Civil War