Iraqi police say at least eight people have been killed in a suicide bombing at a checkpoint manned by U.S.-allied Sunni guards northeast of Baghdad.

A police officer says the woman bomber blew herself up about 8:30 p.m. Thursday near a checkpoint in central Baqouba.

The officer says at least eight guards were killed and 24 other people were wounded. He spoke on condition of anonymity because he was not authorized to release the information.