Afghan rebels kill 3 U.S. troops, 2 others

Three Americans and two other international troops were killed yesterday in an attack in eastern Afghanistan, officials said

Insurgents attacked Afghan and international forces yesterday with rocket-propelled grenades and guns, NATO forces said in a statement. The troops called in air support, forcing the militants to withdraw, the statement said.

Col. Greg Julian, a spokesman for U.S. forces in Afghanistan, confirmed that three of the dead were American military.

The Taliban has vowed to increase ambushes and other attacks as an additional 21,000 U.S. troops flood into Afghanistan this summer in an attempt to stem the group's resurgence and bolster security for August's presidential elections.