NEW : At least three people are killed in a suicide car bombing in Tal - Afar . Political unrest and sectarian violence between Sunnis and Shiites have festered in recent months . NEW : Three people are killed when militants attack a southern Mosul checkpoint . At least 10 people are killed when two bombs explode in Tuz ##la . Bloodshed rises between Sunnis and Shiites .
NEW : At least three people are killed in a suicide car bombing in Tal - Afar . NEW : Three people are killed when militants attack a southern Mosul checkpoint . At least 10 people are killed when two bombs explode in Tuz ##la . Bloodshed rises between Sunnis and Shiites .