Militias involved in driving so-called Islamic State out of Mosul have been carrying out revenge attacks on men and boys in nearby villages.
Amnesty International says the people suspected of having ties to IS have been publicly humiliated, tortured and beaten.
Iraq's special forces paused in their advance on eastern districts of Mosul yesterday to comb the streets for any remaining IS fighters.
Yesterday was the 17th day of an operation to re-take the city.
The Iraqi army is working alongside Kurdish Peshmerga fighters, Shia militias and Sunni Arab tribesmen, with air and ground support from the multinational coalition against IS.