A helicopter dropped two chlorine gas barrels over Northern Syria, medical staff told BBC and the Syrian government confirms.

30-to-33 people were affected in the in Saraqeb, the Idlib province. Medical personnel recognize the symptoms caused by chlorine gas because there are 28 recorded incidents of its use against civilian populations, including women and children. That includes sore eyes, irritated skin, respiratory failures, and bloody mouth foaming. However, medical personnel could not i...