Iraqi authorities say at least eight Iraqi prison guards and detainees have been killed in a shootout at a high-security jail in Baghdad.

Authorities say a prisoner attempting a jail break grabbed an assault rifle from a guard and opened fire. A U.S. soldier was one of at least four people wounded.

The prison is said to hold several hundred detainees including some foreigners held as suspected terrorists.

Meanwhile, demonstrations against alleged fraud in the recent parliamentary elections are continuing in mainly Sunni Arab regions of Iraq.

Protesters are demanding a re-vote in some areas and an international probe into hundreds of ballot complaints.

Initial vote results show that Shi'ite candidates won 130 seats in the 275-seat parliament. Final results are expected next month.

Some information for this report provided by AP and Reuters.