Syria and weapons of mass destruction
| Weapons of mass destruction |
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| By type |
| By country |
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| Non-state |
| Biological weapons by country |
| Chemical weapons by country |
| Nuclear weapons by country |
| Proliferation |
| Treaties |
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Ba'athist Syria researched, manufactured, stockpiled, and allegedly used chemical weapons, and pursued the production of nuclear weapons.
The covert Syrian chemical weapons program began in the 1970s with assistance from Egypt and the Soviet Union. The Syrian civil war saw extensive use of chemical weapons in hundreds of attacks, predominantly by the Syrian Arab Armed Forces using sarin and chlorine. ISIL also used mustard gas, and Seymour Hersh controversially reported that the Syrian opposition forces used sarin. The August 2013 Ghouta sarin attack was the deadliest of the war, triggering international pressure, and in September, the United States, Russia, and Syria announced an agreement for the elimination of Syria's chemical weapon stockpiles, excluding chlorine. The OPCW-UN Joint Mission completed destruction of Syria's declared chemical weapons production facilities at the end of October 2013, and shipped overseas its declared stockpile by June 2014. The mission was undermined as Syria disclosed a ricin program and further production sites throughout 2014 and 2015. According to a OPCW-UN investigation, the Syrian military perpetrated the 2017 Khan Shaykhun sarin attack, which prompted a retaliatory US missile strike. The 2018 Douma chlorine attack triggered a joint missile strike by the US, UK, and France. Following the 2024 fall of the Assad regime, foreign minister Asaad al-Shaibani stated in March 2025 that the Syrian caretaker government would cooperate with an incoming OPCW mission to destroy any remaining chemical weapons.
Syria sought to develop nuclear weapons with assistance from North Korea, and alleged funding and coordination with Iran. It began construction of a weapons-grade plutonium production reactor at Al Kibr. Mossad and the United States Intelligence Community became aware of the site in 2004, and the Israeli Air Force carried out an airstrike that destroyed the facility in 2007. The Syria file at the International Atomic Energy Agency (IAEA) remains open, amid Syria's failure to respond to the IAEA's questions about the destroyed facility, including the whereabouts of the reactor's nuclear fuel. In January 2015, it was reported that the Syrian government was suspected to be building a nuclear plant in Al-Qusayr.