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
Princess Charlotte will turn one tomorrow and to mark the occasion Kensington Palace has released a series of adorable photographs.
Twitter thinks Bob Hoskins is another of 2016's celebrity victims - but the actor actually died in 2014.
Turkish riot police used pepper spray against protesters who were attempting to defy a ban and march on Taksim Square to celebrate May Day.