Aug 9 (Reuters) - A U.S. soldier was killed by a roadside bomb in western Baghdad on Tuesday, the U.S. military said. A British soldier was killed on Tuesday by small arms fire in the southern city of Basra, 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 3,683 Britain 166 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.