BAGHDAD, Sept 14 (AFP) - At least 35 people were killed in a massive car bombing outside Baghdad's main police headquarters Tuesday, leaving a trail of carnage and mayhem in the latest attack on Iraq's fledging security services.
The following is a list of attacks by insurgents in Iraq over the past year that have killed 20 or more people:

2004
- Sept 14: At least 35 people are killed and dozens wounded in a car bomb attack outside Baghdad's main police headquarters in the area of Haifa Street, a bastion of Saddam Hussein loyalists.

- July 28: Seventy people are killed and 56 wounded in a suicide car bombing in the flashpoint town of Baquba, north of Baghdad.
- June 26: Twenty-three killed in car bomb attack in Hilla, south of Baghdad.
- June 24: Insurgents said to be linked to Jordanian extremist Abu Mussab al-Zarqawi unleash a wave of coordinated attacks across Iraq killing more than 100 people and wounding 300.
- June 17: A suicide car bomber rams into a queue of army recruits in Baghdad killing 35 and wounding 140. Six members of the US-trained civil defence force are killed in another bombing north of Baghdad.
- June 12-13: More than 20 Iraqis, including two senior officials, die in and around Baghdad. Five Kurdish army recruits are killed and their bodies burnt.
- April 21: Bomb attacks targeting police stations around Basra in southern Iraq kill at least 68 people, mostly policemen and schoolchildren.
- March 2: Bomb attacks on Shiite Muslims in Karbala and Baghdad kill more than 180 people in the deadliest bombings since the fall of Saddam Hussein.
- Feb 14: At least 23 Iraqi police and four attackers are killed in simultaneous assaults on a police station and the Iraqi civil defence headquarters in Fallujah.
- Feb 11: Forty-seven Iraqis die in a suicide attack outside an army recruitment centre in Baghdad.
- Feb 10: At least 55 people are killed in car bombing outside a police station in Iskandariyah, south of Baghdad.
- Feb 1: At least 105 people are killed and nearly 250 wounded when twin suicide bombers blow themselves up at the headquarters of the two leading Kurdish political parties in Arbil.
- Jan 18: At least 25 people, mainly Iraqis, are killed and 130 wounded in a suicide car bombing outside the US headquarters in Baghdad.

2003
- Nov 12: A truck bomb attack in Nasiriyah, southern Iraq, kills 28 people, including 19 Italians in the worst attack on Italian troops since World War II.
- Oct 27: Explosions across Baghdad target four police stations and the International Committee of the Red Cross, killing at least 43 people and wounding 200.
- Aug 29: A car bomb kills 83 people, including leading Shiite politician Ayatollah Mohammad Baqer al-Hakim, outside one of Shiite Islam's holiest shrines in the central city of Najaf.
- Aug 19: A truck bomb at UN headquarters in Baghdad kills 22 people, including UN Iraq envoy Sergio Vieira de Mello.