A suspected chlorine gas attack on an opposition-held neighborhood in the Syrian city of Aleppo caused dozens of cases of suffocation on Tuesday, rescue workers and a monitoring group said.
The Syrian Civil Defence, a rescue workers' organization that operates in rebel-held areas, said government helicopters had dropped barrel bombs containing chlorine on the Sukari neighborhood in eastern Aleppo.
The Syrian government has denied previous accusations it used chemical weapons during the five-year-old civil war. The Syrian army could not be immediately reached for comment on the latest allegations.
The Civil Defence said on its Facebook page that 80 people had suffocated. It reported no deaths. It posted a video showing wheezing children doused in water using oxygen masks to breathe.
The British-based Syrian Observatory for Human Rights, which tracks Syrian violence using sources on the ground, said medical sources had reported 70 cases of suffocation.