Latest: UN suspends aid conveys to Syria in 'very dark day for humanitarians'

Update 10.38am: The UN humanitarian aid agency has temporarily suspended all convoys in Syria following a deadly air strike on aid trucks the previous night.

Spokesman Jens Laerke, of the Office for the Coordination of Humanitarian Affairs (OCHA), said the temporary suspension of the aid deliveries would hold pending a review of the security situation in Syria.