The Pentagon is considering handing more of the Afghan war responsibility over to a senior special operations officer. — Photo by AP

WASHINGTON: A US admiral said Tuesday that special operations forces in Afghanistan are preparing for a possible expanded role as American forces begin to withdraw after a decade of war.

Adm. Bill McRaven, the special operations commander who led last year's Navy commando raid against Osama bin Laden, confirmed special operations forces would be the last to leave under the Obama administration's current plan, and that the Pentagon is considering handing more of the Afghan war responsibility over to a senior special operations officer as part of that evolution.

He said special operations would combine targeting and training operations this summer to prepare for a smaller overall US footprint, but McRaven stressed that no final decisions had been made.

''We feel like we have to become not only more effective but more efficient,'' McRaven told a Washington audience.

''As far as anything beyond that, we're exploring a lot of options,'' he said.