Several loud explosions have been heard in Baghdad, and smoke was seen rising from the area of the US headquarters in the city.
Reuters news agency quotes a Pentagon official who says three people were injured in a missile or mortar attack. Similar explosions were heard Monday night but did not cause casualties.
Earlier on Tuesday, one US soldier was killed and two others injured by a roadside bomb in Baghdad. The security situation has prompted coalition partner Spain to temporarily withdraw some civilian staff.
A US military spokesman said the soldiers' vehicle hit what the military describes as an improvised explosive device. A similar attack Monday in the northern town of Tikrit killed another US soldier.
British military officials today (Tuesday) also reported the death of a British marine by hostile fire on Friday.
Meanwhile, gunmen in the northern city of Mosul killed an Iraqi judge (Ismail Youssef) who had served under the former government of Saddam Hussein. His family said he was not political and they did not know why he was a target.
Monday, a judge who was investigating former Baath party officials was assassinated in the southern city of Najaf.
Spanish officials cited the security situation in Spain's decision today (Tuesday) to recall embassy staff and coalition experts from Baghdad. Speaking in Berlin, Spanish Prime Minister Jose Maria Aznar said the move is not an evacuation.
Late Monday, the US Senate gave approval to President Bush's 87-billion dollar spending request for military operations and reconstruction efforts in Iraq and Afghanistan. The bill now goes to Mr. Bush for his signature.
Meanwhile, the US military set up checkpoints along Iraq's main north-south road and intensified the search for weapons, including the kind of portable missiles believed responsible for downing a US helicopter and killing 16 soldiers Sunday.