The armed group took several hostages overnight to Tuesday near Hamrin, which is situated 75 kilometers Northeast of the city Baquba, an administrative centre of the province Diyala, Iraqi media reported.
The extremists planted a false checkpoint on the road, stopping for an alleged check the vehicles, where their victims were going. Later the kidnappers took the hostages, which are the natives of the local tribe Zarkush, in the unknown direction.
Seven hostages were executed. The law enforcers found them dead. The fate of other hostages is unclear, Itar-Tass reported.
A warlord of the local al-Qaeda unit was killed in a raid of the Iraqi law enforcement agencies at dawn in En-Nahiya, another district of Diyala. According to available reports, the warlord was behind the kidnappings and murders of local residents and law enforcers.
The explosions and attacks of the gunmen claimed over 1,000 lives in May, the United Nations Organization said.
On Monday, the raids of the extremists resulted in the killing of over 80 people in the country. As many as 37 Iraqi citizens were killed and over 120 people were wounded only in Mosul, 370 kilometers North of Baghdad.