US-led coalition air strikes reportedly killed dozens of Syrian soldiers on Saturday. The incident endangers a US-Russian brokered ceasefire and has prompted an emergency UN Security Council meeting.

The US military says it launched attacks against what it had believed to be ISIL positions in northeast Syria. The missions were halted after Russia informed the US that Syrian military personnel and vehicles may have been hit. Russia says more than 60 Syrian soldiers were killed in four air strikes. The US has relayed its "regret".