Moammar Gadhafi's son Seif al-Islam has been captured, Libya's new authorities announced on Saturday, ending a three-month manhunt for the murdered dictator's longtime heir apparent.

Video footage showed the younger Gadhafi, who is wanted by the International Criminal Court on charges of crimes against humanity, being hauled off into captivity in a northwestern hill town after getting off a flight from the desert south where he was seized.

British Foreign Secretary William Hague is to hold talks with Syrian rebel leaders in London on Monday, a Foreign Office spokeswoman told AFP.

The leading opposition figures would also hold talks with senior officials from Prime Minister David Cameron's Downing Street office, another government ministry source said.

Libya's new government is to be announced by Monday "at the latest," an official of the ruling National Transitional Council said on Saturday.

Fathi Baja, in charge of political affairs for the NTC, said the list being drawn up by interim premier Abdul Rahim al-Kib was "more or less ready."

At least 17 people were killed across Syria on Saturday, activists said, as an Arab League deadline for Damascus to stop its lethal crackdown on dissent was set to expire.

Among the dead were four intelligence agents killed by gunmen who raked their car with gunfire and two mutinous soldiers who died in clashes with regular troops as the military raided the central town of Shayzar after a heavy shelling, the Syrian Observatory for Human Rights reported.

Tunisia's election winners on Friday reached a power-sharing agreement under which an Islamist will be named premier and two leftists will be named president and speaker of the constitutional assembly, media reports said.

The Islamist Ennahda party nominated its deputy leader Hamadi Jebali to lead the government, while Moncef Marzouki, head of the center-left Congress for the Republic, will be named Tunisia’s president, and Mustapha Ben Jaafar, head of the left-wing Ettakatol, will be named speaker of the constitutional assembly.

An opposition MP on Friday urged the U.N. Security Council, which is to meet on Yemen, to refer President Ali Abdullah Saleh to the International Criminal Court over bloodshed linked to his refusal to quit.

"We call on the Security Council to impose sanctions on President Saleh and to refer him to the ICC," said Fued Dahaba, from the opposition Islamist party Al-Islah, leading weekly Muslim prayers near Sanaa's Change Square.

U.S. Secretary of State Hillary Clinton warned Friday of the possibility of a civil war in Syria that either is directed or influenced by Syrian army defectors.

"I think there could be a civil war with a very determined and well-armed and eventually well-financed opposition that is, if not directed by, certainly influenced by defectors from the army," Clinton told the U.S. network NBC.

The decision of the Arab League to suspend Syria is "a historic mistake" and will cause civil war in the unrest-hit country, an Iranian official said Friday, Anatolia news agency reported.

"The path the Arab League has taken is completely about defeating Syria from inside, and triggering a civil war," Anatolia quoted Alaaddin Burucerdi, the head of the Iranian parliamentary commission on foreign policy, as saying.

More than 1,000 Jordanians marched after Muslim weekly prayers on Friday in a protest called by opposition Islamists pushing for political reform and an end to corruption.

The march began outside Al-Husseini mosque in central Amman and moved towards city hall about a kilometer away.

Syria's foreign minister has sent a letter to Arab League chief Nabil al-Arabi requesting changes to a proposal to send a 500-strong delegation of observers to Damascus, the Arab body said on Friday.

The pan-Arab body had agreed to send 500 members of human rights groups, media representatives and military observers to Syria, which said it would welcome them to see the situation on the ground and help implement a peace plan.