A US military statement said the morning incident occurred about 100km southwest of Ghazni.


Another American soldier was also injured, the statement said adding the wounded soldier was flown to Kandahar Airfield hospital for medical treatment and was in stable condition.


The latest fatalities come a day after eight other soldiers of the US-led contingent were wounded in two separate attacks in the north and south of Afghanistan.


Since being deployed in late 2001, more than 90 US soldiers have been killed in different attacks and incidents, mainly in south and southeastern regions of the country.