The US Federal Bureau of Investigation ( FBI) confirmed that a 33-year-old American woman called Nicole Lynn Mansfield was killed while fighting in Syria. "The FBI agents asserted to us yesterday that Mansfield was killed in Syria, " Associated Press Agency on Thursday quoted Mansfield' family as saying. In turn, Nicole's aunt Monica Mansfield said that Nicole had converted to Islam after her marriage to an Arab immigrant. Mansfield and two other foreigners were killed while they were fighting with armed terrorist groups in Syria.