U.N. Security Council calls for nuclear disarmament

The resolution also called for an end to the proliferation of atomic weapons but did not name either Iran or North Korea, which western countries regards as the top atomic threats.

However British Prime Minister Gordon Brown and French President Nicolas Sarkozy specifically called for tougher sanctions against Iran for defying U.N. demands to halt sensitive nuclear work.

Obama presided over the two-hour meeting at U.N. headquarters in Manhattan, the fifth time the council met at the head-of-state level and the first time it was chaired by a U.S. president since the panel was formed in 1946.

"I called for this (summit) so that we may address at the highest level a fundamental threat to the security of all peoples and all nations -- the spread and use of nuclear weapons," Obama said.

Obama said the next year would be "absolutely critical" in determining whether efforts to stop the spread and use of nuclear weapons were successful.

The U.S.-drafted resolution called for "further efforts in the sphere of nuclear disarmament" to achieve "a world without nuclear weapons" and urged all countries that have not signed the 1970 nuclear Non-Proliferation Treaty (NPT) to do so.

Critics of the resolution said it failed to include mandatory provisions that would have required nuclear weapons states to take concrete disarmament steps.

Chinese President Hu Jintao made clear that Beijing had no plans to scrap its nuclear arsenal.

"We will continue to keep our nuclear capabilities at the minimum level required for national security, and make efforts to advance the international disarmament process," Hu said.

Some U.N. diplomats said the nuclear powers were more interested in non-proliferation than disarming.

But Mohamed ElBaradei, the Nobel Peace Prize laureate head of the U.N. International Atomic Energy Agency, said non-proliferation and disarmament were inextricably linked.

"By demonstrating their irreversible commitment to achieving a world free from nuclear weapons the weapons states ... gain the moral authority to call on the rest of the world to curb the proliferation of these inhumane weapons," he said.

All five permanent Security Council members -- the United States, Russia, China, Britain and France -- have atom bombs.