Syrian President Bashar al-Assad said on Thursday that his government’s ultimate goal was to restore state authority over Kurdish controlled areas in northeast Syria after an abrupt U.S. troop withdrawal but he expected it to happen gradually.

Turkey and Russia launched joint patrols Friday in northeastern Syria, under a deal that halted a Turkish offensive against Syrian Kurdish fighters who were forced to withdraw from the border area following Ankara’s incursion.

Saad al-Hariri resigned as Lebanon’s prime minister on Tuesday, declaring he had hit a “dead end” in trying to resolve a crisis unleashed by huge protests against the ruling elite and plunging the country deeper into turmoil.