U.S., Afghan forces come under fire in eastern Afghanistan: U.S. official

U.S. and Afghan forces came under attack in eastern Afghanistan on Saturday, a U.S. official in Kabul said.Colonel Sonny Leggett, a spokesman for U.S. forces in Afghanistan, said a combined U.S. and Afghan force conducting an operation in Nangarhar province was engaged by direct fire.A senior Afghan defense official said it was not clear whether the incident was a result of clashes between Afghan and foreign forces or whether hardline Islamist militants were responsible for the attack.