Iraqi authorities say a suicide bombing in central Baghdad earlier this week may have targeted the country's prime minister.
Baghdad security operations official, Major General Qassim al-Moussawi, said intelligence pointed to an attempt to target Prime Minister Nuri al-Maliki or some other top political leader.
The November 28 car bomb attack inside the so-called Green Zone took place a day before a visit by U.S. Vice President Joe Biden to Iraq's capital.
The attack raised questions about security just as the remaining 12,000 American troops leave Iraq, nearly nine years after the invasion that ousted Sunni dictator Saddam Hussein.
Violence in Iraq is down sharply, but Sunni Islamists tied to Al-Qaeda and rival Shi'ite militias, some backed by Iran, still carry out almost daily bombings, attacks and assassinations.
compiled from agency reports