Syrian activists and rescue workers in the rebel-held part of the contested city of Aleppo said that government warplanes dropped suspected chlorine bombs on Tuesday on a crowded neighborhood, injuring dozens.

The report could not be independently verified and it was not clear how it was determined that chlorine gas was released.

Accusations involving use of chlorine and other poisonous gases are not uncommon in Syria’s civil war, and both sides have denied using them while blaming the other for using it as a weapon of war. Last month, there were at least two reports of suspected chlorine attacks in Aleppo, while the Syrian government also blamed the opposition for using the gas. Continue reading.