Libya announced a "immediate" cease-fire and a halt to military action Friday, hours after the U.N. Security Council authorized the use of force to protect besieged civilians in Libya. Libyan Foreign Minister Moussa Koussa said Libya is "obliged to accept the Security Council resolution that permits the use of force to protect the civilian population." He said Libya has decided on "an immediate ceasefire and the stoppage of all military operations." It was not immediately clear how his announcement could affect plans of some countries to intervene militarily in Libya -- authorities in Britain and France had talked before Koussa's remarks of imminent military action. Speaking to reporters Friday in Tripoli, Koussa said Libya plans to protect civilians and provide them with humanitarian assistance and that it is obliged to protect all foreigners and their assets. He also called for a fact-finding mission to sort out the events on the ground.