U.S Army troops on patrol in Herat, Afghanistan last month (file photo) (epa)
13 February 2006 -- The U.S. said a military vehicle struck a bomb in central Afghanistan, killing four American troops.
Shortly after the blast, militants fired at the troops with guns and rocket-propelled grenades. The statement said the military called in air support.
Earlier today reports said that Taliban guerrillas had ambushed a militia unit working with U.S. forces in southern Helmand Province. Reports say the militants killed eight men.