Syria's new authorities launched an operation in a stronghold of ousted president Bashar al-Assad on Thursday, with a war monitor saying three gunmen affiliated with the former government were killed.

Syria's new rulers began an operation in western Tartous province, home to many from ousted leader Bashar Assad's Alawite sect. The killing of 14 police officers the previous day has irked the Islamist-led authorities.

Forces loyal to former Syrian President Bashar al-Assad killed 14 police members and wounded 10 others, according to the caretaker government, as the country experiences its worst violence since the autocrat’s toppling early this month.