Bombs killed nearly 150 people and wounded at least 200 in Jableh and Tartous on Syria’s Mediterranean coast on Monday in the government-controlled territory that hosts Russian military bases, monitors and state media said.

Islamic State claimed responsibility for the attacks in the cities that have up to now escaped the worst of the violence in the five-year-old conflict, saying it was targeting members of President Bashar al-Assad’s Alawite minority.