Al Mada newspaper said the al-Qaida-linked Iraqi Islamic State claimed responsibility for the assassination of Naji Jabara, leader of Saladin Reconciliation Council.
The report said the group made the claim on its Web site. Jabara was a tribal leader who brought most of Saladin province's tribal leaders together to fight al-Qaida.
The assassination was carried out by a roadside bomb that targeted Jabara's convoy, resulting in the sheik's death along with five of his bodyguards, the newspaper said.
Shabab Al Iraq newspaper reported that two civilians died and seven others were wounded when a roadside bomb exploded east of Baghdad.
Two of those injured were severely wounded, a security source said.
The paper reported witnesses said "the bomb exploded when a police convoy passed it."
Al Sabah Al Jadeed newspaper reported the U.S. Army announced the arrest of three suspects linked to Iranian militias in Sadr City.
The paper said the three were suspected of kidnapping five Britons last May. The five -- a computer expert and his four bodyguards -- were kidnapped from the Ministry of Finance and remain missing.
The four security guards worked for Canada's Garda World Security Corp., one of the top private security companies that operate in Iraq.
