37 Countries Call for UN Inspectors To Be Allowed To Investigate Recent Alleged Use of Chemical Weapons in Syria

Inspectors arrived in Syria before the most recent alleged use of chemical weapons

The UK, France and Turkey are leading calls for a tough international response to an alleged chemical weapons attack in Syria in which activists said hundreds were killed on Wednesday.

The UK is calling for UN weapons inspectors already in Syria to be granted access as a matter of urgency.

French Foreign Minister Laurent Fabius said that if proven, the attacks would merit a "reaction of force".