The Latest on developments in Syria (all times local):

9:05 p.m.

A local health official says the death toll from an Islamic State ambush on a city and villages in a south Syrian province has climbed to 204.

Hassan Omar tells The Associated Press that hospitals had reported over 180 others wounded.

Omar said among the dead were civilians who picked up weapons to defend their hometowns against the IS assault on Thursday.

The Syrian Observatory for Human Rights monitoring group put the toll at 183 killed — 89 civilians and 94 local militiamen. It said another 45 IS militants were killed in the clashes.

The Observatory called it the single deadliest day for Sweida province since civil war broke out in Syria in 2011