The United States vetoed a U.N. Security Council draft resolution Saturday that sought to condemn an Israeli military offensive in the Gaza Strip and demand Israeli troops pull out of the territory.

U.S. Ambassador John Bolton said the Arab-backed draft resolution was "biased against Israel and politically motivated."

"This resolution does not display an evenhanded characterization of the recent events in Gaza, nor does it advance the cause of Israeli-Palestinian peace to which we aspire and for which we are working assiduously," he told the Security Council.

The draft received 10 votes in favor and four abstentions, along with the U.S. vote against. Britain, Denmark, Japan and Slovakia all abstained. The U.S. is one of five permanent members of the council that has the power to veto resolutions.

It was the second U.S. veto this year of a Security Council draft resolution concerning Israeli military operations in Gaza. The U.S. blocked action on a document this summer after Israel launched its offensive in response to the capture of an Israeli soldier by Hamas-linked Palestinian militants.

In Jerusalem, Israeli Foreign Ministry spokesman Mark Regev said the draft resolution was one-sided. "It's good that it wasn't accepted by the Security Council," he said.

The Palestinians' Hamas-led government, however, was furious at the U.S. veto.

"This decision by the U.S. government gives unlimited cover to commit more massacres of innocent Palestinians," spokesman Ghazi Hamad said. "This is a shame on the American administration, which says it is trying to promote human rights and democracy in the Middle East."

More criticism came in from elsewhere in the Middle East. Arab League Secretary-General Amr Moussa said the veto "will only increase the anger" toward Israel, and Egyptian Foreign Minister Ahmed Aboul Gheit accused the Security Council of "turning a blind eye to Israeli acts in Gaza."

The Arab League was preparing for an emergency meeting of foreign ministers in Cairo, Egypt, on Sunday to decide how to respond the latest Israeli offensive.

Qatar's Ambassador Nassir Al-Nasser also said the failure of the Security Council to act on the draft will lead to continued Israeli violence against Palestinians.

"Any lukewarm reaction or response on our part gives the impression we are shirking from our humanitarian responsibilities," said Al-Nasser, who sponsored the resolution on behalf of the Palestinians. Qatar is the only Arab nation on the council.

Palestinians strengthened calls for Security Council action after an early morning Israeli artillery barrage in the northern Gaza town of Beit Hanoun killed 19 people Wednesday. In an open session of the General Assembly on Thursday, Mansour called the attack "state terrorism" and said the perpetrators should be held accountable under international law for war crimes.

Israel has expressed regret for the loss of life in Beit Hanoun but has said it will continue operations to stop militants from launching rockets into Israel. Prime Minister Ehud Olmert is scheduled to visit Washington on Sunday to meet with President Bush.

The draft resolution had been weakened slightly in recent days to help improve its chances of passage. A section was added demanding the Palestinian Authority take immediate action to bring an end to violence, including the firing of rockets into Israel.

It also called for the U.N. secretary-general to establish a "fact-finding mission" to probe Wednesday's attack in Beit Hanoun, a step below ordering a full investigation.

In addition, it backed off calls for U.N. observers to be placed on the Gaza-Israel border, asking instead for the "possible establishment of an international mechanism for protection of the civilian populations."

But in his remarks to the Security Council, Bolton said the draft was still too one-sided. He said it compared legal Israeli military operations with the firing of rockets into Israel — an act of terrorism. He called the fact-finding mission unnecessary and said the text failed to condemn the ruling Hamas party's refusal to renounce terrorism.

Both Bolton and Deputy British Ambassador Karen Pierce voiced support for returning to the internationally backed "road map" peace plan, which has been stalled for years.

But Michael O'Hanlon, a senior fellow at The Brookings Institution, said the fact that the council allowed the draft to go to a vote showed the world's frustration with the U.S. not involving other members of the so-called Quartet of Mideast mediators in recent decisions on Israel. The other members are the U.N., the European Union and Russia.

"They don't have a stake in the talks and they are more willing now to force our hand," he said. "A lot of times the world has felt (the U.S.) has been too pro-Israel, but in this case, people are just fed up."