Yazidi refugees are beginning to speak out about the horrific treatment they experienced at the hands of terrorist group ISIS.

“My older brother, my father, my mother, my wife and even my two kids were killed. All I have left of them is just one picture on my mobile phone,” a man identified as Tahysn to the London Daily Mail.  He said that his sons were three and four when ISIS slit their throats.

Other refugees described watching other die from thirst and heat as they were trapped on a mountain awaiting help from western military groups.

“When we left Sinjar, the kids suffered a lot… Many men from our village died, many women have been captured. I saw some kids dying because of the heat,” a woman named Rezal said. “[ISIS]… even cut the throats of the babies.”

The refugees said that many of their kidnapped relatives have been trying to starve themselves to death because of the extreme brutality of their captors.