BAGHDAD, Iraq (AP) _ A roadside bomb exploded north of Baghdad early Wednesday, killing one U.S. 1st Infantry Division soldier and bringing the U.S. military death toll since the start of operations in Iraq to 900, including two civilians linked to the military.

Maj. Neal O'Brien of the 1st Infantry Division said the most recent soldier killed was on patrol in a Bradley fighting vehicle in Duluiyah, 45 miles north of Baghdad, when the bomb detonated shortly after midnight Wednesday. On Tuesday, two U.S. Marines and two U.S. soldiers were killed in action in Anbar Province, a Sunni-dominated area west of Baghdad.

At least 893 U.S. service members and two civilians linked to the Department of Defense have died since the beginning of military operations in Iraq in March 2003, according to a count of names of the dead released by the Pentagon. The latest deaths would raise the toll to 900.

Estimates of the number of U.S. service members killed in Iraq vary, with some already exceeding the 900 figure. An AP count differs slightly from the Pentagon figures.