DUBAI (Reuters) - An Iranian war veteran fell into a coma in a Tehran hospital last week after suffering respiratory failure, his lungs ravaged by mustard gas during the Iran-Iraq war 30 years ago.

A joint UN-OPCW panel tasked with determining who was behind the deadly sarin gas attack in the Syrian town of Khan Sheikhun is facing heavy political pressure as it prepares to present its findings ...

BEIRUT (Reuters) - A Syrian rescue service operating in rebel-held territory said on Tuesday a helicopter dropped containers of toxic gas overnight on a town close to where a Russian military ...