Al Qaeda battle in Afghanistan to stretch for years:US

WASHINGTON: Al Qaeda fighters are still trying to make inroads into Afghanistan, U.S. Defense Secretary Leon Panetta said on Thursday, cautioning that battling the group would be a core U.S. mission there for years to come.

Panetta made the comments as the United States weighs how large a military force to keep in Afghanistan when the NATO combat mission ends in 2014, ending a war that, at that point, will have stretched for over 13 years.

Commenting on the scope of a post-2014 counter-terrorism mission, Panetta did not mention al Qaeda allies or Taliban militants battling U.S. forces.

He said fighting the core al Qaeda group to prevent it from re establishing a safe haven in Afghanistan was "going to be the fundamental thrust of the (counter-terrorism) effort." A narrow focus could help limit the size of the mission.

"Although we clearly have had an impact on (al Qaeda's) presence in Afghanistan, the fact is that they continue to show up," Panetta told reporters at the Pentagon.

"And intelligence continues to indicate that they are looking for some kind of capability to be able to go into Afghanistan as well."

A U.S. defense official, speaking on condition of anonymity, estimated there were still only about 100 al Qaeda militants in Afghanistan.

Panetta declined to offer any estimate for the size of the force,saying that is "exactly what's being discussed" now.