Two NATO soldiers were killed in two separate incidents in southern Afghanistan Monday, the alliance said in a statement.

"One soldier was killed by enemy hostile action and another was killed in an improvised explosive device blast while supporting an Afghan National Police operation," the statement said.

NATO did not disclose the nationalities of the dead soldiers or the exact location of the incidents.

Southern Afghanistan is the center of the Taliban-led insurgency. More than 1,200 people -- mostly militants -- have died in insurgency-related violence in Afghanistan this year, according to a tally compiled by The Associated Press.

Separately, a suicide bomber in eastern Afghanistan struck a military patrol in Paktika province also on Monday, wounding four Afghan soldiers and a civilian translator working with the U.S.-led coalition, said a provincial government spokesman Ghamai Mohammadyar.

The bomber, who died in the blast, attacked the patrol in Paktika's Bermel district, which is close to the border with Pakistan.

Last year militants launched over 140 homicide attacks on Afghan and foreign troops, but most victims have been civilians.