Jan 8 (Reuters) - A U.S. soldier was killed in Baghdad on Sunday when his patrol came under small arms fire, the U.S. military said on Monday.In a separate incident a U.S. soldier was killed during combat operations in the province of Salahaddin on Sunday. 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 3,014 Britain 127 Other nations 123 IRAQIS: Military Between 4,900 and 6,375# Civilians Between 52,853 and 58,454* # = 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.