A roadside bomb has ripped through a U.S. military vehicle in Afghanistan, killing one soldier and wounding two others in the northeastern province of Kunar.

A U.S. military spokesman says the troops were driving an armored vehicle southwest of the provincial capital of Asadabad. Kunar is a mountainous province on the border with Pakistan and is considered a hideout for militants.

Another American soldier was killed and four were injured in southern Afghanistan when their armored vehicle rolled over near Kandahar city.

A U.S. military statement says enemy activities were not a factor in the accident. Kandahar is a stronghold of Afghanistan's former Taleban rulers.

Some information for this report provided by AFP and AP.