A suicide car bomber killed three Iraqi policemen when he blew up his vehicle outside the police headquarters in the southern city of Basra, a police officer said.
Twenty people - six policemen and 14 civilians - were also wounded in the blast which occurred at 8 a.m. (03:00 GMT) in the central Al-Ashar district, according to police Brig. Gen. Mohammed Ali.
Witnesses at the scene said the suicide driver wore Arab traditional clothes and headdress.
Basra, Iraq's second largest city, has been tense amid violence between rival Shiite militias linked to political parties. This has raised concerns about security, after the British military last month pulled back its troops from Basra's center to a nearby airport to allow Iraqi security forces to take over.