(Adds U.S. death)

April 21 (Reuters) - One U.S. soldier was killed and two others were wounded when they were hit by a roadside bomb during a patrol southwest of Baghdad, the U.S. military said.

Earlier Poland's Ministry of Defence said a Polish soldier was killed and four wounded in a roadside bomb attack near Diwaniya, 180 km (112 miles) south of Baghdad, on Friday.

Following are the latest figures for military deaths in Iraq since the U.S.-led invasion in March 2003:

U.S.-LED COALITION FORCES:

United States 3,317

Britain 144

Other nations 125

IRAQIS:

Military Between 4,900 and 6,375#

Civilians Between 62,144 and 68,141*

# = Think-tank estimates for military under Saddam Hussein killed during the 2003 war. No reliable official figures have been issued since new security forces were set up in late 2003.

* = From www.iraqbodycount.net (IBC), run by academics and peace activists, based on reports from at least two media sources. IBC says on its Web site that the figure under estimates the true number of casualties.

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