CHRONOLOGY-The deadliest bomb attacks in Iraq

(Reuters) - A lorry bomb in northwest Iraq this week that sparked a wave of reprisal killings was one of the largest bombs in four years of insurgent attacks, a senior U.S. officer said on Thursday.

The toll from Tuesday's bomb in the town of Tal Afar and a second nearby rose to 85, according to the head of the local hospital.

Here is a list of some of the deadliest bomb attacks in Iraq this year:

January 16, 2007 - A car bomb and suicide bomber strike the Mustansiriya University in central Baghdad killing at least 70 people and wounding 180.

January 22, 2007 - A double car bombing at a second-hand goods market in Bab al-Sharji, a busy commercial area in central Baghdad, kills 88 people and wounds 160.

February 1, 2007 - Two suicide bombers strike at a market in the Shi'ite town of Hilla, killing 61 people and wounding 150.

February 3, 2007 - Lorry bomb kills 135 people and wounds 305 at a market in the Sadriya quarter of central Baghdad.

February 12, 2007 - Multiple car bombs explode in the Shorja wholesale market, killing at least 71 people and wounding 165. At least nine others are killed at the Bab al-Sharji market, also in central Baghdad.

March 6 - Two suicide bombers strike in Hilla, south of Baghdad, killing 105 pilgrims. Insurgents also launch attacks against Shi'ite pilgrims in a total of 12 attacks. In all 137 pilgrims died and 310 were wounded.

March 27 - Two lorry bombs explode in Tal Afar, close to the Syrian border and the regional capital of Mosul. At least 85 people are killed in the two blasts, with 183 wounded.