Syria’s interim government says it has reached a landmark agreement with Kurdish-led forces to integrate them into state institutions as it tries to unify the country’s diverse communities after a decade of civil war.

The United States encouraged its Syrian Kurdish allies to reach Monday's landmark deal with the Islamist-led government in Damascus, six sources said, an agreement that could stave off further conflict in northern Syria at a time of uncertainty over the future of U.S. forces deployed there.