BAGHDAD, Jan. 16 (Xinhua) -- A series of deadly attacks in Baghdad killed at least 103 people and injured more that 240 on Tuesday, casting a shadow on security operation between the Iraqi government and U.S. forces to curb violence.

    The following are major bombing attacks in Iraq since the outbreak of the Iraq war in March 2003 (in time descending order).

    -- On Dec. 2, 2006, at least 51 people were killed in three coordinated car bombings in a commercial area in central Baghdad.

    -- On Nov. 23, 2006, a series of apparently coordinated bombings killed 200 people and wounded another 250 in the Shiite stronghold of Sadr city in eastern Baghdad, making it the deadliest attack in Iraq since the U.S.-led invasion in 2003.

    -- On April 7, 2006, suicide bombings inside a Shiite mosque in northern Baghdad left at least 79 dead and 160 others wounded.

    -- On Feb. 22, 2006, a powerful explosion blew off the golden dome of a mosque in Samarra, one of the holiest Shiite shrines in the country, further intensifying sectarian strife.

    -- On July 16, 2005, a suicide bomber set himself on fire near a fuel truck outside a Shiite mosque in the southern town of Musayyib, killing 98 people and wounding many more.

    -- On Feb. 28, 2005, a car bomb attack at a medical center in the city of Hilla, south of Baghdad, killed more than 110 civilians and wounded around 200.

    -- On March 2, 2004, explosions hit Shiite Muslim shrines in Karbala and Baghdad in Iraq, killing at least 181.

    -- On Feb. 1, 2004, twin suicide bombers killed 109 people in two Kurdish party offices in Irbil.

    -- On Aug. 29, 2003, a car bombing killed more than 100 people, including Iraq's top Shiite Muslim leader Ayatollah Mohammed Baqeral-Hakim, and injured more than 200 others in Shiite holy city of Najaf.

    -- On Aug. 19, 2003, a bombing attack on the UN headquarters in Baghdad killed 24 people and wounded over 100 others. The top UN envoy to Iraq, Sergio Vieira de Mello, died in the attack.