An Iraqi official says authorities have found the bodies of 48 Sunni tribesmen killed by the Islamic State group in the restive western province of Anbar.

Faleh al-Issawi, a councilman in the Anbar provincial government, says the bodies were found Thursday in a mass grave outside the town of Hit.

He says those killed were tribal fighters allied with the government and members of the security forces who were rounded up from villages around Hit after IS militants seized the area in early October. Most of the tribal fighters came from the Al Bu Nimr tribe, he said.

A day earlier, another 30 bodies of Sunni fighters killed by the Islamic State group in Hit was found. The town is located about 140 kilometers (85 miles) west of Baghdad.