Aug 7 (Reuters) - Four U.S. soldiers died on Monday in an explosion while on combat duty in Diyala province, the U.S. military said.

Three U.S. soldiers were killed when a roadside bomb hit their convoy south of Baghdad on Saturday, the U.S. military said on Tuesday.

One U.S. soldier was killed and another wounded on Monday when an armour-piercing bomb detonated, hitting their vehicle during combat operations in western Baghdad, the U.S. military said.

A British soldier was killed by small arms fire during an operation in Basra on Monday, Britain's Defence Ministry said.

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

U.S.-LED COALITION FORCES:

United States 3,682

Britain 165

Other nations 129

IRAQIS:

Military Between 4,900 and 6,375#

Civilians Between 68,641 and 75,081*

# = 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 underestimates the true number of casualties.

The U.S-led military coalition toll includes casualties from Iraq and the surrounding area where troops are stationed.

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