Iraqi police in Kirkuk say a suicide car bomber struck a funeral service for a Shi'ite soldier, killing at least four people and wounding some 25 others.
Officials said the bomber drove into the middle of the service before detonating a blast.
Also Thursday, the prime minister and president of Romania publicly disagreed about a proposal to withdraw the country's 890 troops from Iraq.
Prime Minister Calin Tariceanu proposed a withdrawal because of the human and financial cost of the deployment.
But President Traian Basescu called the idea "unacceptable." Under Romanian law, the country's Supreme Defense Council, chaired by the president, has the power to decide on a withdrawal.
The president said the prime minister's statement would hurt Romania's credibility abroad. Some information for this report was provided by AFP, AP and Reuters.