As US-backed forces stand on the brink of retaking Mosul, reports continue to emerge that they are summarily executing captured ISIS fighters.

ISIS fighters are sometimes executed at the front lines, while others are executed after being interrogated, a Mosul-based commander told Integrated Regional Information Networks, a nonprofit media site that focuses on conflict zones.

Extrajudicial killings of ISIS fighters have been emerging pretty much since the fight for Mosul began about seven months ago.

In late 2016, a video appeared showing Iraqi soldiers dragging a suspected ISIS fighter along the ground, then crushing him with a tank before shooting him. In January, another video emerged showing Iraqi troops dragging and beating three ISIS fighters as they begged for their lives. The three were then shot to death and trampled.