Officials in Iraq say two Iraqi journalists have been shot and killed in the northern city of Mosul.
In Baghdad, two Iraqi policeman were killed when they were attacked by gunmen.
These latest killings came amid growing concern that insurgents have penetrated Iraq's security forces and police. Iraq's national security advisor (Mouwafak al-Rubaie) admitted to British radio today (Wednesday) that such a problem does exist.
Earlier, Iraqi Prime Minister Ibrahim al-Jaafari said a British raid on an Iraqi prison which angered his government will not undermine relations between the two countries.
Mr. al-Jaafari said an investigation has been ordered into Monday's raid on the prison in the southern city of Basra. British troops raided the jail, after they became concerned that two of their undercover soldiers had been arrested and handed over to a Shi'ite militia.
Meanwhile, in Basra, hundreds of Iraqis protested the British troop presence.