Terrorists detonated a roadside bomb in the central Iraqi city of Samarra (search) and mortar rounds landed near a U.S. military outpost in violence that killed one and injured three others, including two children, police said Tuesday.

The mortar rounds slammed into a residential neighborhood near a U.S. military base after dawn on Tuesday, wounding the two youngsters, said Police Maj. Saadoun Ahmed Matroud.

The late Monday roadside blast in the Jubairiya neighborhood killed one bystander and injured another, Matroud told The Associated Press. The target of the blast wasn't known.

Samarra is 60 miles north of Baghdad.