The U.S.-backed Syrian Democratic Forces (SDF) said its fighters were waging fierce battles with Islamic State militants in the Old City of Raqqa on Tuesday after the U.S.-led coalition opened two small openings in its historic walls. The SDF's media office said four of its fighters were killed in fighting in the Old City. The coalition said on Monday the SDF fighters had breached the Old City after the coalition targeted two 25-meter sections of the 2,500-meter wall.



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