The Khan al-Assal chemical attack was a chemical attack in Khan al-Assal, Aleppo, Syria on 19 March 2013, which according to the Syrian Observatory for Human Rights resulted in at least 26 fatalities including 16 government soldiers and 10 civilians, and more than 86 injuries. Immediately after the incident, the Syrian government and opposition accused each other of carrying out the attack, but neither side presented clear documentation.BBC, 19 March 2013, Syrians trade Khan al-Assal chemical weapons claims The Syrian government asked the United Nations to investigate the incident, but disputes over the scope of that investigation led to lengthy delays. In the interim, the Syrian government invited Russia to send specialists to investigate the incident. Samples taken at the site led them to conclude that the attack involved the use of sarin, which matched the assessment made by the United States. Russia held the opposition responsible for the attack, while the US held the government responsible. UN investigators finally arrived on the ground in Syria in August (with a mandate excluding the evaluation of culpability for the chemical weapons attacks), but their arrival coincided with the much larger-scale 2013 Ghouta attacks which took place on 21 August, pushing the Khan al-Assal investigation "onto the backburner" according to a UN spokesman. The UN report, which was completed on 12 December, found "likely use of chemical weapons in Khan al-Assal" and assessed that organophosphate poisoning was the cause of the "mass intoxication".
A February 2014 report from the UN Human Rights Council stated that the chemical agents used in the Khan-Al-Assal attack bore the "same unique hallmarks" as those used in the 2013 Ghouta attacks. The UN report also indicated that the perpetrators of the Al-Ghouta attack "likely had access to the chemical weapons stockpile of the Syrian military". In neither incident, however, was the commission's "evidentiary threshold" met in regard to identifying the perpetrators of the chemical attacks.U.N report A-HRC-25-65 Reuters, 5 March 2014
Laboratories working for the Organisation for the Prohibition of Chemical Weapons compared samples taken by a UN mission in the Damascus suburb of Ghouta after the Aug. 21, 2013 attack, when hundreds of civilians died of sarin gas poisoning, to chemicals handed over by Damascus for destruction in 2014. The tests found “markers” in samples taken at Ghouta and at the sites of two other nerve agent attacks, in the towns of Khan Sheikhoun in Idlib governorate on April 4, 2017, and Khan al-Assal, Aleppo, in March 2013. “We compared Khan Sheikhoun, Khan al-Assal, Ghouta,” said one source who asked not to be named because of the sensitivity of the findings. “There were signatures in all three of them that matched.”
Background
The attack took place in Khan al-Asal, in the context of the Syrian civil war, in the Battle of Aleppo's southwestern front. Khan al-Asal is a village about west-southwest of the center of Aleppo.
At the time of the chemical attack on 19 March, government forces held the village and the nearby Syrian Army Base. Rebel forces had been shelling the village from the surrounding areas for weeks, and had gained control of the police academy located southwest of Khan al-Asal.
The rebel forces had taken control of the police academy at the conclusion of a fierce eight-day battle that concluded on 3 March, when the last government defenders of the police academy were killed. According to the Syrian Observatory for Human Rights (SOHR), at least 120 government soldiers/policemen and 80 rebels were killed during the battle.
Incident The incident took place in the early morning of 19 March 2013. Between seven and half past seven, an object filled with sarin landed in Khan al-Asal. The rocket landed near a living quarter with farming areas around the houses, and released sarin gas on its impact. The gas drifted southwest with the wind into the Haret al-Mazar neighborhood, wounded 124 persons and killed 20 along with an unspecified number of animals. Several witnesses reported seeing people scratching their bodies and observed people lying in the streets. Some of the wounded were unconscious; some had convulsions and foamed from the mouth and some complained of vision problems.
Local civilians and Syrian army personnel rescued and evacuated those affected to six hospitals in the area, mainly the University Hospital in Aleppo. According to witness statements given to the UN investigation team, first responders were exposed to contamination from the chemical rocket. A Reuters photographer was quoted as saying that he had visited victims in Aleppo hospitals and that they had breathing problems; he also said that people had told him that the air smelled of chlorine after the attack.
Initial claims Both the opposition and the Syrian government claimed that a chemical attack was carried out in Khan al-Asal in the early morning of 19 March 2013.
Government claims The first report came from the government-owned Syrian Arab News Agency (SANA), which reported that "terrorists" had fired a rocket "containing chemical materials" into the Khan al-Assal area, which landed 300 meters from a Syrian army position. The news agency displayed photographs of what it said were the victims, the impact point and remains of the rocket used. Later on the day, the Syrian government wrote an official letter to the United Nations stating that opposition forces had fired a chemical rocket, "from the Kafr Da'il area towards Khan al-Asal in Aleppo governorate, some 5 km away. The missile fell in a civilian-populated area, some 300 meters from a Syrian Arab army position".SANA, 19 March 2013, 25 Killed by Rocket with Chemical Materials Fired by Terrorists in Aleppo Countryside The UK Channel 4 reporter Alexander Thomson reported on 23 March that an anonymous Syrian military source had briefed him that artillery reports from the Syrian Army suggested that a small home-made rocket was fired from the vicinity of Al-Bab towards a military checkpoint at the entrance of Khan al-Asal. This rocket was said to contain "a form of chlorine known as CL17, easily available as a swimming pool cleaner", in the form of "gas, dissolved in saline solution." As others pointed out, this would amount to ordinary household bleach which is prepared by dissolving chlorine in sodium hydroxide solution.
In a subsequent report to the UN, the Ministry of Health of the Syrian Arab Republic described the symptoms of patients admitted to a local hospital as consisting of "unconsciousness, pupil contraction, neurological symptoms, rapid pulse, breathing irregularity, murmurs in lungs, and general weakness, in addition to a decrease in cholinesterase efficiency in patients' plasma".
Opposition claims On the day of the attack, an activist from the Syrian Observatory for Human Rights (SOHR) said "16 government soldiers and 10 civilians had been killed after a rocket landed on Khan al-Assal". An activist, from the Khan al-Assal Freemen Brigade, said “The regime tried to target the liberated police academy with what is thought to be a scud missile, but the missile did not reach its intended target, and fell on the government controlled areas, where Assad forces are positioned”.
A rebel fighter from the Ansar Brigade told Reuters that a missile had hit the town at around 8 a.m., and that he had seen pink-tinged smoke rising after a powerful blast shook the area. He said: "We were about 2 km from the blast. It was incredibly loud and so powerful that everything in the room started falling over. When I finally got up to look at the explosion, I saw smoke with a pinkish-purple color rising up. I didn't smell anything, but I did not leave the building I was in," he said. "The missile, maybe a Scud, hit a regime area, praise God, and I'm sure that it was an accident. My brigade certainly does not have that capability and we've been talking to many units in the area, they all deny it." He said the explosion was quickly followed by an air strike. A fighter jet circled the police academy held by the rebels on the outskirts of Khan al-Assal and bombed the area, he said.
On the day of the attack, Qassim Saadeddine, a spokesman for the Free Syrian Armys Higher Military Council in Aleppo, told Reuters; "We were hearing reports from early this morning about a regime attack on Khan al-Assal, and we believe they fired a Scud with chemical agents".BBC, 21 August 2013, Syria chemical weapons allegations He later told TIME that “the regime is trying to hide its crime by accusing the FSA,” and accused the government of attacking its own people in order to smear the opposition.
Another rebel commander, Abdul Jabbar al-Oqaidi, said he had witnessed the attack. He described it as an errant strike on a government-controlled neighborhood by Syrian warplanes flying at high altitude. The explosions from the attack emitted a gas that appeared to cause suffocation, he said, and claimed that some victims had been treated in a rebel field hospital.
Early commentaries Some independent chemical weapons analysts, after studying initial intelligence reports and video coverage of survivors on state-run television, initially did not believe that the government or rebels had used advanced chemical weapons. Lack of burns, skin discoloration or quarantine measures were noted. The Syrian military appeared initially to believe that chlorine had been used, rather than an organophosphate.
One analyst (Bretton-Gordon) cautioned that conventional high explosives can also produce an odor which might be mistaken for chlorine, and that there was no indication from the images he had seen that the chemical agent had been used.CBS News, 19 March 2013, Syria rebels, regime blame each other for first alleged chemical weapons attack While Jean Pascal Zanders, a chemical weapons expert and a senior research fellow for the EU Institute for Security Studies, cast doubt on the use of chlorine, saying that one small rocket couldn't deliver the quantity needed to kill 25 people.
Russian investigation A Russian investigation team obtained samples in Khan al-Asal from 23 to 25 March 2013. On 9 Jul, Vitaly Churkin, Russian UN ambassador, said Russian experts analyzed samples of material they collected from the site of the attack, at a Russian laboratory certified by the OPCW. The report that Russia submitted to UN concluded that sarin had been used in the chemical attack, and that the rebels were responsible for making the sarin and launching the attack. The report was not made public. The conclusions were summarized by Churkin in a press conference at the UN on 9 July.CBS News, 29 August 2013, Syria chemical weapons attack blamed on Assad, but where's the evidence? A summary of the report was posted on the Russian Foreign Ministry website on 4 September 2013 following the Ghouta chemical attack.
Churkin's presentation and the summary on the Russian Foreign Ministry's website made the following claims in support of its assertion that the attack was carried out by the opposition: The projectile used in the incident “didn’t contain chemical stabilizers in the toxic substance,” and "does not belong to the standard ammunition of the Syrian army" and its bursting charge was RDX, which is "not used in standard chemical munitions". Soil and projectile samples were found to contain sarin and diisopropyl fluorophosphate, which was "used by Western states for producing chemical weapons during World War II." The sarin had been produced recently in "cottage industry" conditions without the use of chemical stabilisers that would permit longer-term storage.