April 3 (Reuters) - Four U.S. soldiers were killed in combat in Iraq on Monday, the U.S. military said.

Two U.S. soldiers and a Marine were killed in separate attacks in the Anbar province, the heartland of the Sunni Arab insurgency.

One soldier died and three were wounded when a large truck bomb exploded in Kirkuk.

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 3,257

Britain 136

Other nations 124

IRAQIS:

Military Between 4,900 and 6,375#

Civilians Between 60,411 and 66,280*

# = 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.

AlertNet news is provided by