The Philippine Senate formally approved an anti-nuclear bill Monday that U.S. officials warned could lead to the dismantling of strategic American military bases in the country.

The 200-member House of Representatives still has to come up with its own version of the bill implementing a provision in the new Constitution banning nuclear weapons in the country, making it unlikely that a law on the subject will be passed before the bicameral Congress adjourns Friday.At the national defense committee of the House, Defense Secretary Fidel Ramos and President Corazon Aquino's national security adviser, Emmanuel Soriano, opposed the passage of similar bill in the lower house.

Ramos said he told the committee the presence of nuclear weapons does not pose a threat to the nation's security.