U.S. deaths in Iraq hit lowest level since '04

updated 4:10 p.m. ET May 31, 2008

BAGHDAD - U.S. military deaths in Iraq have fallen in May to the lowest monthly level in more than four years.

Officials said 21 American troops have been killed this month, four of them in non-hostile incidents. That's one more than the lowest monthly figure of the war, set in February 2004.

Civilian casualties were down sharply, too. At least 522 Iraqi civilians and security troopers were killed this month, according to figures compiled by The Associated Press from Iraqi police and military reports. That's down sharply from April's figure of 1,080 and the lowest monthly total this year.

The improvement came as Iraqi forces assumed the lead in offensives in three cities and a truce with Shiite extremists took hold.

But U.S. commanders warned that the relative peace was fragile because no lasting political agreements have been reached.

More from msnbc.com World Blog: Anger and hatred on Urumqi streets Local governments face painful budget choices Family turns to Facebook in hunt for missing son World Blog: Ghana gets set for Obama’s visit  No-kill shelter nation? Maybe in 5 years  Irresistible! 9 gadgets we covet

MORE FROM CONFLICT IN IRAQ

Conflict in Iraq Section Front

Worst violence since U.S. pullback hits Iraq   U.S. releases 5 Iranian officials in Iraq Army's new mission: To exit Iraq Conflict in Iraq Section Front   Add Conflict in Iraq headlines to your news reader: