Diplomats said it appeared unlikely there would be another vote to try to renew the mandate before it expires on April 30
Citing sources in the camp at Ain Issa, Observatory Director Rami Abdulrahman said there was a state of 'anarchy' inside.
The Kurdish-led administration in northern Syria earlier said some members of Islamic State families had managed to slip out of the camp after it was shelled by advancing Turkish and Syrian rebel forces. An official in the Kurdish-led Syrian Democratic Forces said they had no further details about the situation at the camp.