**Four US soldiers have been killed in Afghanistan in the past 24 hours, the US military says.**Three of the Americans were said by Nato to have died in southern Afghanistan on Sunday and the other in the east in a bomb explosion on Monday.
Three Afghan soldiers were also killed in a separate incident on Sunday by a roadside bomb in Helmand province.
The year 2009 has been the deadliest for foreign troops since the US-led invasion overthrew the Taliban.
In a statement released on Monday, Nato’s International Security Assistance Force (Isaf) said of those who died in southern Afghanistan, two US soldiers had been killed by a bomb attack and the other in a separate firefight with insurgents.
Afghanistan’s Ministry of Interior said two other Afghan National Army soldiers had been wounded in the Musa Qala district by the same roadside bomb that had killed their three colleagues on Sunday.
It also said six soldiers in Kunar province and one in Kandahar had been injured in incidents in the past 24 hours.
The ministry did not give any details of how the soldiers had been hurt.