Rows of graves are dug for victims of Saturday's massive car bomb in Baghdad

A Shiite Muslim insurgent group says it has been behind attacks on coalition forces in Iraq, but vowed not to target Iraqi soldiers and civilians.

In a videotape aired Sunday on a Lebanese television station, an unknown group calling itself the Muslim Resistance in Iraq said it aims to rid the country of "foreign occupation."

The group denounced American and British troops and their allies.

The tape shows attacks against what appear to be coalition troops and tanks. Its authenticity could not be independently verified.

Meanwhile, Sunni Arab lawmakers in Iraq have threatened to boycott the legislature until kidnappers free a colleague abducted Saturday in Baghdad.

Iraqi police say another lawmaker - a Shi'ite - survived an assassination attempt Sunday when a bomb exploded near his convoy in the Karrada district of the capital.

In other violence Sunday, at least four people died in Baghdad and in the town of Rashad, near Kirkuk.

Meanwhile, Iraqi officials say Abu Musab al-Zarqawi, the slain leader of al-Qaida in Iraq, has been buried in an undisclosed location in the country. He was killed June 7 by a U.S. airstrike northeast of Baghdad.

Zarqawi's family had called for his body to be returned to his homeland of Jordan for burial. But Jordanian officials refused the request for security reasons. The U.S. military confirmed the burial but declined to release details.