Fighters of Syrian Democratic Forces make the V-sign as their convoy passes in Ain Issa, Syria October 16, 2017. REUTERS/Erik De Castro

BEIRUT (Reuters) - U.S.-backed militias have completely taken Syria’s Raqqa from Islamic State, the Syrian Observatory for Human Rights said on Tuesday.

The Syrian Democratic Forces (SDF), an alliance of Kurdish and Arab militias backed by a U.S.-led international alliance, has been fighting Islamic State inside Raqqa since June.