A car bomb blew up at a police patrol in a town north of Baghdad on Saturday, killing five people, including four policemen, police said.

Two policemen and one civilian were also injured in the blast that took place in Khan Bani Saad, Colonel Adnan Abdul Rahman said.

Rahman could not immediatly give further details on the incident, but said "we are waiting for more reports."

Khan Bani Saad, some 30 km northeast of Baghdad, is situated near the troubled city of Baquba in central Iraq.