The global chemical arms watchdog said Tuesday it was "seriously concerned" by reports of a suspected gas attack on a rebel-held town in Syria that killed at least 58 people.

"The Organisation for the Prohibition of Chemical Weapons (OPCW) is seriously concerned about the alleged chemical weapons attack reported by the media this morning in the Khan Sheikhun area of southern Idlib," the group said, adding it was "gathering and analysing information from all available sources."

Source: AFP