Earlier this week a rebellion broke out in the central Libyan city of Sirte against the nation's ISIS affiliate, with locals backed by the Misrata militia surrounding ISIS forces in several buildings in a key neighborhood. They accused ISIS of killing a local religious leader.

The battle went poorly for the locals, however, and by Friday it was clear that ISIS had retaken any lost ground. Now, reports are emerging claiming a full-scale massacre is being carried out against people in the opposing neighborhood, with between 150-200 killed.

Details are still emerging, but ISIS publicly beheaded 12 of the rival fighters. The 150-200 toll appears to include both fighters and civilians in the area that rebelled. Fighting is still reportedly taking place in some areas, but seems to be mostly wrapped up.