- On Tuesday a helicopter dropped containers of toxic gas overnight
-on a town close to where a Russian military helicopter was shot down hours earlier (killing all passengers).
- The opposition Syrian National Coalition (SNC) accused President Bashar al Assad of being behind the attack.
-Assad has denied allegations.
- 33 people, mostly women and children, were affected by the gas
-which they suspect was chlorine, in Saraqeb, in rebel-held Idlib province.
- This is the second time Saraqeb has been hit by toxic gas.
- The Organisation for the Prohibition of Chemical Weapons confirmed in late 2015 that sulfur mustard, commonly known as mustard gas, had been used for the first time in the conflict
-There has been more focus on the issue of dropping the toxic gas which has distracted the issue of identifying who shot down the Russian plane.