"The USS Kearsage and the USS Ponce have entered the Mediterranean," the authority said in a statement.
The Kearsage amphibious ready group, with about 800 marines, a fleet of helicopters and medical facilities, could support humanitarian efforts as well as military operations.
"We`re certainly moving assets to be closer (to Libya)," a US defence official told AFP in Washington on Tuesday. "A ship like the Kearsage is capable of many types of missions."
Western powers are arguing over imposing a proposed no-fly zone over Libya to support rebels fighting Kadhafi`s regime. Some opposition figures in Libya have begun calling for air strikes.
But Kadhafi warned in a speech on Wednesday that "thousands" would die if the West intervened to support the uprising against him.
An American aircraft carrier, the USS Enterprise -- which has fighter jets that could enforce a possible no-fly zone -- could also be called upon for the Libya crisis.
The carrier is currently in the north of the Red Sea, according to the US Navy`s website. (*)
Editor: Kunto Wibisono
Copyright © ANTARA 2011