Islamic State group fighters killed at least 232 people in and around Mosul last week as Iraqi troops advanced on the city, the UN rights office said Friday.
"Last Wednesday 232 civilians were reportedly shot to death. Of these there were 190 former Iraqi Security Forces officers," rights office spokeswoman Ravina Shamdasani told reporters in Geneva.
"These reports have been corroborated to the extent possible," she added, stressing that the number of people killed in recent days could be higher.
Up to 900 Isis militants have been killed in the offensive to retake the city, according to the US.