3 Americans killed in Afghanistan

Three Americans including two members of the Nato-led force in Afghanistan have been killed by homemade bombs, the military said yesterday.
The other casualty was a civilian worker, it said without giving further detail.
One of the soldiers died in an improvised explosive device (IED) blast in southern Afghanistan, the International Security Assistance Force (Isaf) said in a statement.
"In a separate incident an Isaf service member and a civilian contractor, both from the United States, died in an IED strike in eastern Afghanistan," the statement said, without elaborating.
Friday's casualties bring to 470 the number of foreign soldiers killed in Afghanistan since the start of the year. More than half the dead are Americans.
IEDs are the number one killer of international troops, who are battling a Taliban insurgency at its worst since US-led troops overthrew the Taliban regime in 2001.