WASHINGTON — A 33-year-old American who was fighting for the militant group the Islamic State in Iraq and Syria was killed in recent days in a battle with a rival group in Syria, a senior American official said on Tuesday.
The authorities identified the man as Douglas McAuthur McCain, of San Diego. According to a human rights group that tracks the conflict in Syria, Mr. McCain was killed in a battle in Marea, a city in northern Syria near the Turkish border.
ISIS has been fighting the Free Syrian Army, a rival rebel group backed by the United States, for control of the city. There have been reports in recent days that the Free Syrian Army has seized a number of towns from ISIS and killed several dozen of its fighters, two of whom were Americans.
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