Islamic State 'killing dozens of deserting militants' in Mosul

Islamic State has been carrying out mass killings in Mosul amid a government-led offensive to retake the city, according to reports made to the UN human rights office.

Spokeswoman Ravina Shamdasani said the office has received reports of an incident in which IS allegedly killed 50 of its own militants at the Ghazlani military base in Mosul "for alleged desertion".