Israeli troops handed the body of a Palestinian man arrested hours earlier in the occupied West Bank to Palestinian health authorities as a major operation in the flashpoint city of Jenin continues for a sixth day, Reuters reports.

The Palestinian Red Crescent said it had received the body of 58-year-old Ayman Rajeh Abed from the village of Kafr Dan, just outside Jenin after he was arrested around dawn on Monday. The director of the Wissam Bakr Hospital in Jenin said the body bore signs of beatings and torture.

The Israeli military said Abed had been detained during counterterrorism operations and experienced a “cardiac event” on arrival at a detention facility. He was given initial treatment by medical staff from the military, before being evacuated to the hospital in Jenin.

“The IDF (Israeli Defence Forces) is aware of reports that the suspect died during his evacuation by the Red Crescent,” it said in a statement, adding that details of the incident were under review.