Meanwhile, Human Rights Watch calls for probe into purported airstrike that hit Shi'ite mosque, killing at least 13.
After meeting with U.S. defense secretary in Baghdad, Iraq's prime minister rejects Turkish participation in campaign to oust Islamic State from stronghold.
The story of a man who was involved in many of the most dramatic chapters in Israeli history can finally be told, following his death last month at age 90.
Mayor of Iraqi city says Friday's strike hit a funeral procession, killing 17; Russian defense ministry places blame on U.S.-led coalition jet.
Meanwhile, Iraqi forces retake a town south of the city as part of their offensive against Islamic State militants.
Identity of service member and exact location of incident remains unknown.
General says U.S.-trained forces retake town, where ISIS militants unleashed at least nine suicide truck bombs.
U.S.-trained elite forces are seen as far more capable than the mainstream squads that crumbled as Islamic State advanced in 2014, and have played a central role in liberating cities and towns over the past year.
Up to 6,000 ISIS fighters remain in the Iraqi city, Lt. Gen. Talib Shaghati says, as a wide-scale operation to retake Mosul enters its third day.
U.S. forces confirm the presence of sulfur mustard agent on ISIS munition fragments, but say the group's technical ability to develop such weapons is limited.