USA TODAY NETWORK

The United Nations Security Council is expected to meet in an emergency session Wednesday about the suspected deadly chemical attack that killed scores of civilians, including children, in Syria. Watch the open meeting live in the player above.

Human rights reports said the gas appeared to be a virulent deadly strain and covered a wider area than past chemical attacks, which if confirmed, would be the largest in Syria since August 2013. The Syrian government of President Bashar Assad denied using chemical weapons, but the U.S. and international communities were unconvinced. Russia’s defense ministry said Wednesday that a Syrian airstrike on "terrorist" workshops producing chemical weapons was responsible for the deaths.