In Afghanistan, government officials and NATO spokesmen say a series of clashes across the country killed four American soldiers, four Afghan police officers and at least eight militants Monday.

In eastern Afghanistan, NATO said two separate roadside bombs killed four soldiers from the NATO-led force. A statement said the victims were U.S. troops, but

did not say where they were killed.

Officials in northern Kunduz province said Taliban militants attacked a police outpost near the town of the same name, killing four police officers.

U.S. military officials say airstrikes and ground fighting in two central provinces, Wardak and Ghaznisay, killed at least eight militants.

In Kabul, meanwhile, Belgium's prime minister, Herman Van Rompuy, announced his government will double its humanitarian aid to Afghanistan, raising it to $17 million both this year and next.

Mr. Van Rompuy told reporters the stabilization of Afghanistan is strategically important "not only for the region, but the rest of the world."

About 600 Belgian troops are serving in Afghanistan with other NATO forces.

Some information for this report was provided by AFP and Reuters.?