An American soldier has been killed by a bomb during 'combat related operations', the US Army said on Saturday. The soldier died on Friday, a statement said without providing further details. The army is only weeks away from a June 30 deadline to leave cities and major towns ahead of a complete withdrawal from Iraq by the end of 2011, as part of a security accord signed between Baghdad and Washington. The deaths bring to 4,312 the number of American troops killed since the 2003 US-led invasion that ousted dictator Saddam Hussein but sparked a deadly insurgency, according to an selfnews count based on the independent website icasualties.org. 