US President George Bush has urged world leaders to remain resolute and demanded quick action to disarm Iraq.
"The game is over," he declared. "Saddam Hussein will be stopped."
President Bush said he would be open to a second UN resolution on Iraq, following up one approved last November, but only if it led to prompt disarmament.
"The Security Council must not back down when those demands are defied and mocked by a dictator.
"If the UN fails to act, the United States, along with a growing coalition of nations, is resolved to take whatever action is necessary to defend ourselves and disarm the Iraqi regime," he said.