Saboteurs on Sunday blew up a pipeline that supplies gas to Israel, the 12th such attack in a year, security officials said.

Masked gunmen planted explosives under the pipeline in the Al-Massaeed area, close to the town of El-Arish in the north of the Sinai Peninsula, they said.

French President Nicolas Sarkozy Saturday condemned China and Russia's veto of a U.N. Security Council resolution on the Syria crisis, saying it encouraged the Syrian regime crackdown.

"The Syrian tragedy must stop," said Sarkozy in a statement issued through his office.

Russia and China's veto Saturday of a U.N. resolution on the bloodshed in Syria is a "shockingly callous betrayal" of the Syrian people, Amnesty International said.

Moscow and Beijing have acted in a "completely irresponsible" way, the London-based human rights group added.

A member of the opposition Syrian National Council said the group took control of Syria's embassy in the Libyan capital on Saturday without meeting any resistance.

"The Syrian National Council has taken physical control of the embassy today," said council member Anas al-Khalid.

Information Minister Adnan Mahmoud on Saturday accused Syrian rebels of shelling the protest hub of Homs to swing a U.N. Security Council vote in their favor.

"The reports on some satellite channels that the Syrian army shelled neighborhoods in Homs are fabricated and unfounded," Mahmoud said in a statement to Agence France Presse.

The government is trying to negotiate the withdrawal of al-Qaida linked militants from Zinjibar, capital of Abyan province in southern Yemen, tribal and government officials said on Saturday.

The negotiations, taking place through tribal mediators, are "ongoing," a government official told Agence France Presse on condition of anonymity, without giving further details.

Russia and China on Saturday vetoed a U.N. Security Council resolution condemning the Syrian government's murderous crackdown on protests for the second time.

Western governments reacted with fury to the new block on U.N. action over President Bashar Assad's 10 month-old assault on demonstrators which followed weeks of acrimonious negotiations over the text.

President Barack Obama on Saturday accused Syrian President Bashar Assad's government of murdering civilians in an "unspeakable assault" in the city of Homs, and demanded that Assad step down.

"Assad must halt his campaign of killing and crimes against his own people now. He must step aside and allow a democratic transition to proceed immediately," Obama said in a statement.

Palestinian president Mahmoud Abbas and Hamas chief Khaled Meshaal will meet on Sunday in Qatar, Fatah party spokesman Azzam al-Ahmed told Agence France Presse on Friday.

Abbas and Meshaal "will discuss forming a government and political questions after the failure of talks" with Israel, Ahmed said.

U.S. Secretary of State Hillary Clinton told her Russian counterpart Sergei Lavrov that Washington will push for a U.N. Security Council vote on Syria later Saturday, a U.S. official said.

However, it was not clear what if any progress Clinton had made in bridging differences with Foreign Minister Lavrov over the terms of an amended Arab- and Western-backed draft resolution in New York.