Mourners react during a funeral of an Iraqi soldier, who was killed during clashes in Ramadi, in Najaf, 160 km (99 miles) south of Baghdad, January 10, 2014.
IN PHOTO: Mourners react during a funeral of an Iraqi soldier, who was killed during clashes in Ramadi, in Najaf, 160 km (99 miles) south of Baghdad, January 10, 2014. REUTERS/Alaa Al-Marjani

Dozens of women and children, whose bodies were found in a well, were among the 322 members of the Al-Bu Nimr tribe killed by Islamic State militants in the past week, said the Iraqi government, according to rt.com. Tribal leader Sheikh Naeem al-Ga'oud clarified that 75 members of his tribe had been murdered on Sunday. They had been trying to escape the Islamic State and were shot near Haditha town.

The Al-Bu Nimr tribe is a Sunni clan that is at loggerhead with the Islamic State. It held off IS in western Anbar province for weeks but then ran out of fuel and arms. Once the clan went back, IS roped in all the members and began to execute them since last week.

They had been pulled from their beds and grabbed from homes in the night. Fathers, brothers and sons, who were part of the "U.S.-allied Albu Nimr tribe -- the Sunni clan considered among the last holdouts against ISIS" were massacred, according to CNN.com.

IS also killed 50 members of the tribe when they ran from Anbar province on Friday. Though they went on foot in a desert near Tharthar Lake, they were intercepted and killed. Ga'oud confirmed that the Iraqi central government never gave his tribe arms and men, though he had asked them many times. In another incident, a security official from Anbar confirmed that 35 bodies had been discovered in a mass grave. More than 150 Albu Nimr tribals were found near Ramadi in Anbar province on Thursday morning. Most of them were Al-Bu Nimr tribal fighters who ran after being under siege of the IS for weeks and tried to reach their main village of Zauiyat Al-Bu Nimr. However, they were captured by IS militants who murdered and threw them into mass graves. It is clear that militants from the Islamic State are exacting vengeance on the Sunni leaders who have been organizing rebellions and opposition to them, according to Daily Mail.

In another case, the bodies of more than 70 Al-Bu Nimr men were found in a huge grave near Hit, which was about 80 kms northwest of the provincial capital of Ramadi. One witness told Reuters that they had seen those bodies that morning. The militants said that the people were from Sahwa, who battled "your brothers the Islamic State." It was a punishment reserved for anyone who fought the Islamic State, said a witness, who refused to mention his name. While IS permitted the men to go safely from their villages to Hit, it then shot them, according to Reuters. On Wednesday morning, IS queued up 30 members of the tribe in the center of Hit, and shot them.

Killings have become routine in the ISIS areas, so it is necessary to stem them. The Islamic State has established control over huge tracts of land in the Anbar province, which stretches from Syrian borders right up to Baghdad. The militant group has a large air base and also the Haditha dam around the Euphrates River.