Suspected militants have attacked a convoy of Afghan and alliance troops in eastern Afghanistan, killing three NATO soldiers and wounding one other.
NATO officials say the soldiers were on patrol in Nuristan province bordering Pakistan, when a roadside bomb hit their vehicle. NATO has not released the nationalities of the soldiers, but U.S. troops make up the bulk of the international forces in the area.
In a separate incident, officials say a suicide bomber killed an Afghan police officer in the southern Ghazni province.
The attacks follow Monday's battle in southern Afghanistan, where the NATO alliance said 55 insurgents and one NATO soldier were killed.
Taleban fighters have stepped up their campaign against NATO-led troops in southern Afghanistan in recent months, frequently slipping over the border from bases in northwestern Pakistan.
Afghan officials say Taleban leaders frequently find shelter in Pakistan. Islamabad denies those accusations, saying it has deployed 80,000 troops in the rugged border region to hunt down Taleban and al-Qaida fugitives.Some information for this report was provided by AP and Reuters.