The U.N. organization assisting in investigating the most serious crimes in Syria says the country’s new authorities were “very receptive” to its request for cooperation during a just-concluded visit to Damascus — and it is preparing to deploy.

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.