In Iraq, security forces have said, an air strike has killed at least 20 Iraqi pro-government Sunni tribal fighters in an area south of Mosul. It was unclear whether it was the Iraqi military or the US-led coalition against the Islamic State terror group that mistakenly hit the fighters. <br/><br/>The raid occured in the east of the town of Qayyarah, which was recaptured from IS in August. The strike comes as an alliance of Iraqi forces prepare for a final push to retake Mosul from IS. Mosul is the last major IS stronghold in Iraq.