Syrian regime and Isis carried out chemical attacks, say UN investigators
International team accuses Assad government of using chlorine gas in two incidents, and Isis fighters of using mustard gas
WHAT IS CHLORINE GAS AND HOW DID IT BECOME A WEAPON?
The Syrian government allegedly dropped barrel bombs full of chlorine on an Aleppo suburb. BY SIMON COTTON
UN hears accounts of Syria chemical weapons attacks
Security Council mulls possible action after watching video of doctors treating victims of alleged chlorine bomb attack.
