The Latest Breaking News from Bashar al Assad

Calm prevailed on Sunday in rebel-controlled northwest Syria a day after a Turkish-brokered truce ended bloody clashes between rival factions which risked wider internecine warfare among opponents of President Bashar al Assad's rule, residents and rebels said.

Turkish President Recep Tayyip Erdogan, a strong opponent of the Syrian regime, says his country could be ready for dialogue with Damascus. It's a prospect that's causing alarm in the ranks of the Syrian opposition that relies heavily on Turkish support.

Clashes among Syrian rebel groups backed by Turkey ended on Sunday after they agreed to a truce, residents and rebel sources said, easing fears of wider internecine warfare among opponents of President Bashar al Assad's rule.

U.S. backed Kurdish-led forces tightened the siege on neighborhoods under the control of the Syrian government in two Kurdish-controlled cities in northeast Syria, officials from both sides said on Thursday.