Chemical weapons in Aleppo siege

"It was one week ago today, when rebel forces broke through the government siege of Aleppo. These rising death tolls could be an indication of the government fighting back and retaliating," Al Jazeera's Sayah said. 

Elsewhere, opposition activists in the town of Daraya on the suburbs of Damascus also accused the Syrian government of dropping barrel bombs containing napalm - an incendiary weapon made up of both fuel and a gel substance.

According to opposition activists, "government forces and helicopters have dropped about 12 [barrel bombs] today and another 24 yesterday", with one person killed and very few injured, Sayah said on Sunday.

The substance's use against civilian targets, or in areas densely populated with civilians, has been prohibited by the United Nations. The chemical is very flammable and difficult to remove from the skin.

http://www.aljazeera.com/news/2016/08/syria-war-150-civilians-killed-days-160814135759952.html