— April 29 — Twin car bombs tear through Baghdad's Sadr City, killing 41.

— April 24 — Back-to-back suicide bombers strike near Shiite shrine in Baghdad, killing 60.

— April 23 — Baghdad suicide bomber hits Iraqis collecting humanitarian aid, killing 31.

— April 23 — Suicide bomber strikes restaurant north of Baghdad in Muqdadiyah, killing 57.

— April 6 — Series of bombings within four hours in Baghdad kill 37 people.

— March 26 — Car bomb tears through market in Shiite area in east Baghdad, killing 20.

— March 23 — Suicide bomber strikes Kurdish funeral north of Baghdad in Jalula, killing 27.

— March 10 — Suicide bomber targets tribal leaders at market in Abu Ghraib, killing 33.

— March 8 — Suicide bomber strikes police academy in Baghdad, killing at least 30.

— March 5 — Car bomb tears through livestock market in Hillah, killing 13.

— Feb. 13 — Female suicide bomber targets Shiite pilgrims in Musayyib, killing 40.

— Feb. 11 — Twin car bombs explode at a bus terminal and market area in Baghdad, killing 16.

— Jan. 4 — Female suicide bomber strikes Shiite pilgrims in Baghdad, killing 38.

— Jan. 2 — Suicide bomber hits luncheon at a tribal leader's home in Youssifiyah, killing 23.