Gunmen in Iraq have killed two American civilians and an Iraqi translator working for the Coalition Provisional Authority.
Local police and Polish military officials responsible for the area where Tuesday's shooting occurred say the gunmen were pretending to be police. But U.S. coalition officials said the incident was under investigation and some details reported by local officials may not be correct.
Polish military officials say the killings occurred at a makeshift roadblock late Tuesday near Hillah, south of Baghdad, and troops later arrested five Iraqis who had the bodies of the victims in their car.
In a separate incident in the southern Iraqi city of Nasiriyah, four Iraqi police officers were killed Tuesday in a gunbattle when they confronted members of a private militia that acts as a security force for Shi'ite political parties. Details of that incident were also still being investigated.
Meanwhile, a bomb blast in the town of Baquba, north of the capital, injured at least one person and badly damaged the offices of a Shi'ite party - the Supreme Council for the Islamic Revolution in Iraq. There has been no claim of responsibility for the blast.