The UK, France and Turkey are leading calls for a tough international response to an alleged chemical weapons attack in Syria on Wednesday in which activists said hundreds were killed.
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”.
However, there is no sign that the UN team will be allowed to investigate.
It took months to negotiate permission for them to visit other sites around the country and the Syrian government, backed by Russia, is resisting calls to give them access to the eastern Damascus suburb of Ghouta where this apparent atrocity took place. Part of the reason is the area is contested between government forces and rebels and is therefore unsafe.