(Reuters) - Syrian rebel fighters loyal to al Qaeda ceded ground near the Turkish border to rival Islamists on Sunday, activists said, in what seemed to be a tactical withdrawal to end clashes between Syrian- and foreign-led opponents of President Bashar al-Assad.
As Syria's civil war gets ever more complex amid a broad regional confrontation between Sunni and Shi'ite Muslims, the United States raised the prospect of Assad's sponsor Iran, the Shi'ite power long at odds with Washington and its Sunni Arab allies, playing some role in this month's Syrian peace talks.
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