An international rights group says Islamic State militants tortured and abused Kurdish children captured earlier this year near the northern Syrian town of Kobani.

Human Rights Watch based its conclusions on interviews with several children who were among more than 150 Kurdish boys from Kobani abducted in late May as they were returning home after taking school exams in the city of Aleppo.

It says around 50 of the Kurds escaped, while the rest were released in batches — the last coming on Oct. 29.

Four of the children held by the extremists described frequent beatings with a hose and electric cable.

Human Rights Watch's Fred Abrahams says the evidence of the Islamic State group's abuse of children "underlines why no one should support their criminal enterprise."