A bomb blast has killed at least four Iraqi civilians in the southern city of Basra, and another explosion has been reported outside a court in Baghdad.
The bomb in Basra was on a road frequently used by British troops who are part of the U-S led coalition in Iraq. But today's (Tuesday's) explosion apparently went off as a minibus carrying Iraqi civilians passed.
In the capital Baghdad, meanwhile, Iraqi police said six people were wounded by a bomb blast outside a court of appeal.
There have been numerous bomb attacks in the Iraqi capital and other areas of the country, most of them targeting the US led coalition or police and local officials seen as supporting the coalition.
The commander of US forces in Iraq says the coalition is detaining several thousand people, including 20 suspects who were originally thought to have ties to the al-Qaida terrorist network.
General Ricardo Sanchez added, however, that after further investigation and questioning, US intelligence has not been able to establish that the 20 suspects were members of al-Qaida.
US officials have said they suspect foreign terrorists, including al-Qaida volunteers, have slipped into Iraq to take part in attacks against US -led coalition forces. The top US civil administrator in Iraq -- Paul Bremer -- has warned of new attacks on US led forces unless intelligence in the country improves.