Anad Mahmoud, a 22-year-old electrician, says masked ISIL men dressed in long Pakistani-style robes came last week to the farming village of Guba, on the outskirts of Mosul. Though Mr. Mahmoud is a Sunni Arab, most of his neighbours were Shia Turkmen and Shabaks, another religious minority.

Mr. Mahmoud says the Shiite men captured by ISIL were made to dig a pit that would prove to be their mass grave. “They took about 80 Shiite people to a giant hole. They put jerry cans that were filled with something like kerosene in the pit with them, and then blew them up. I heard the sound.”

[...]

Mr. Mahmoud, who now shares a tent with five Mosul refugees in Khazir, says he narrowly avoided death himself. “First they said ‘You are a Shiite and we are going to execute you.’ Then when they discovered [from his identification] that I am Sunni, they said ‘You are living in a Shia area, so we will treat you the way we treat them. You must be killed.’”

[Bolding mine]