Dozens reported killed in suspected Syria gas attack, Damascus denies

At least 70 people have died in Syria in a suspected gas attack in Douma, the last rebel-held town in Eastern Ghouta. [Photo: Courtesy]

A chemical attack on a rebel-held town in eastern Ghouta killed dozens of people, a medical relief organization and a rescue service said, and Washington said the reports - if confirmed - would demand an immediate international response.

Medical relief organization Syrian American Medical Society (SAMS) said 41 people had been killed, with other reports putting the death toll much higher. The civil defense rescue service, which operates in rebel-held areas of Syria, put it as high as 150 in a report on one of its Twitter feeds.