The medical charity, Medecins Sans Frontiers, has called for an independent investigation into deadly air strikes earlier this week on hospitals in Idlib in northern Syria.
In all, at least 50 people were killed when missiles hit five medical centres and two schools in rebel-held towns on Monday.
“This attack can only be considered deliberate. It was probably carried out by the Syrian government-led coalition that is predominantly active in the region,” said Joanne Liu, international president of the charity.
In a report published on Thursday, MSF claims there are regular attacks on medical facilities in Syria. Since January 2015 it estimates there’ve been around 100 air strikes against hospitals it supports.
Meanwhile, the UN has announced plans to make its first air drops of relief in Syria to Deir-al-Zor, a town of 200,000 besieged by Islamic State militants.
UN aid agencies don’t have direct access to areas held by ISIL where civilians are facing severe food shortages and sharply deteriorating conditions.