BAGHDAD, Iraq — A least 30 bodies were discovered in an unfinished west Baghdad house on Saturday as police and local citizens groups probed neighborhoods they said until recently were under the control of militants from al-Qaida in Iraq.

Iraqi police described the grave site in the heavily Sunni Muslim Hur Rijab section of the Dora neighborhood as a grisly scene of decomposed bodies wrapped in black plastic.

The bodies, some bearing identification and others not, appeared to be mainly Shiites. They were transported in numbered bags to the Kadhimin mosque in a Shiite portion of Dora, police said.

The discovery was made during a joint operation by police and members of the Awakening Council of Sunnis who have turned against the militant group and are cooperating with authorities. A source for the Interior Ministry said police were searching for bombs when they were drawn to the deserted house by a foul smell.

A mass grave containing at least 22 bodies also believed to be victims of sectarian killings was discovered Nov. 6 by joint Iraqi-U.S. forces in a Sunni area near Tharthar Lake northwest of Baghdad.

In August, police in Baqubah found about 60 bodies buried on the northwestern outskirts of the city in strife-torn Diyala province. Authorities believe they, and other victims previously found in mass graves, were killed by the Iraq government more than a decade ago when it was run by Saddam Hussein.

Some other mass graves described during the trial that led to Saddam's execution have not been unearthed.

Elsewhere Saturday, a reporter for the independent TV station Al Baghdadiya was reported kidnapped in the capital. The station's manager, who asked not to be named, said Muntathar Zaidi, who disappeared Friday, presented balanced news with a focus on national unity and humanitarian subjects.

He said Zaidi's brother reached his cell phone and was told by the person who answered to forget about him. There has been no further contact with the abductors since, he said.

The U.S. military reported Saturday that its forces killed six insurgents in operations north of Samarra and another in a raid targeting criminal elements north of Baghdad in the Rashidiya area.

Four unidentified homicide victims were found in the capital Saturday, the Ministry of Interior said.

A fuel depot in Latifiya, south of Baghdad was ablaze Saturday morning after a Friday night mortar attack, police said.

In the south, an official for the Sunni Waqf said prominent Sunnis had escaped two bombings Saturday, one injuring three children at the home of an Iraqi Islamic party member and the other at the home of a city council member. Also, a Sunni glass merchant was killed by gunmen who shot into his car, he said.