**Four US soldiers have been killed in roadside bombings in Iraq, three of them in an attack in northern Iraq and another in the capital Baghdad.**US military officials did not give the exact location of the attacks and said next of kin were still being notified.
At the end of June, US-led multi-national forces withdrew from Iraqi urban areas, leaving responsibility in the hands of the Iraqi police and army.
About 4,340 US troops have been killed in Iraq since the 2003 US-led invasion.