All the evidence points towards the Syrian regime, but no one has been held accountable.
An April report by a new investigations team at the Organisation for the Prohibition of Chemical Weapons found the Syrian regime air force used sarin gas and chlorine on the village of Lataminah in March 2017.
The United States, Britain and France launched strikes against the Syrian regime in response to an alleged chemical weapons attack after mulling military action for nearly a week.
Syrian voices are often missing from the debates surrounding what the future of their country should look like. So what do Syrians think about a potential US strike on Syria?
The air raids which also killed at least 10 civilians left a foul smell, causing five people to suffer from suffocation, says the Britain-based Syrian Observatory for Human Rights.
A class taught by volunteer emergency response teams is hoping to provide children with the tools for survival.
Over the course of the Syrian conflict, chemical warfare has caused a high number of casualties. But it's not the first time mankind has employed this controversial art of war.
The allegation that a nerve agent leaked from a warehouse controlled by rebels in the Syrian province of Idlib has been dismissed by experts in the industry.
Tuesday's attack on the town of Khan Shaykhun killed at least 100 people and injured more than 500, according to the Syrian opposition's health minister, Firas Jundi.
In Idlib, survivors of a chemical attack describe scenes of "a tragic disaster."
The victims of the Idlib attack that killed at least 100 people, including many children, were exposed to sarin gas, autopsies have revealed. What is sarin and where has it been used as a weapon before?
The opposition Syrian National Coalition accused Syrian regime leader Bashar al Assad of being behind the attack.
Subscribe to our Youtube channel for all latest in-depth, on the ground reporting from around the world.
Copyright © 2021 TRT World.