Isis militants have kidnapped more than 100 people after reportedly lining up and killing more than 75 tribesmen and women in Al-Anbar province, Iraq.
According to Faleh al-Issawi, a tribal spokesman, the shooting happened in the village of Ras al-Maa.
"More than 100 persons from Albu Nimir tribe were kidnapped by the Isil [Islamic State] terrorist where the corpses of 75 of them, including women and children, were discovered in Tharthar area of northern Anbar," a source told IraqiNews.com.
Earlier last week, a number of people from the same tribe were found in mass graves.
Al-Issawi told AP that members of the Albu Nimr tribe had rebelled against Islamic State after the militant group seized the town of Hit last month.
"These killings are taking place almost on a daily basis now in the areas under the control of the Islamic State group, and they will continue unless this terrorist group is stopped," he said.
On Thursday, authorities found 48 bodies of tribesmen believed to have been killed by the group.
Experts say that the tribe is being targetted after refusing to swear allegiance to Islamic State.
In recent months Islamic State has seized swathes of Anbar province, and the US has carried out air drops of food supplies for the tribes living in the region.
New UN figures show that at least 1,273 Iraqis were killed in violence in September.
The casualties do not take account of Anbar and other militant-held areas of the country.
Of those killed, 379 were in the capital Baghdad.
On Saturday, 12 people were killed when a car bomb detonated in an outdoor market in the Youssifiyah. Police said that 25 people were injured in the explosion.
In eastern Baghdad, three people were killed near a tent for Shi'ite pilgrims, and six police officers and six police officers killed by a suicide bomber in the southern district of Dora.