A Syrian doctor who treated victims of a reported attack in the suburbs of Damascus told ITV the symptoms presented to him were consistent with that of a chemical gas attack.
Dr Abu Ghafer said that around 5am residents in Douma and Adra reported respiratory and other problems, and that they believed the regime dropped shells in a nearby farm.
Locals believe the that regime forces dropped shells filled with Sarin gas onto neighbouring deserted fields and farms. The wind blew across remnants of the chemical.
Many people began to panic in a highly populated area.
Some had severe respiratory attacks and were given local drugs.
The majority of people treated themselves with water and damp cloths. Symptoms included breathlessness, suffocation and blurred vision. Many also had panic attacks.
More top news
People are invited to share alleged racism or xenophobia stories after Brexit vote to highlight "need for a plan to tackle" social effects.
Tyson Fury says England should beat Iceland 10-nil because they're "not even a footballing nation", as he spoke about his Klitschko rematch.
The mum wrote the emotional letter after her eight-year-old with Down's syndrome was the only child in his class not invited to a party.