Egyptians voted 77% in favor of the military's plans for a swift return to civilian rule after mass protests ousted president Hosni Mubarak last month, official results showed on Sunday.

They approved a package of limited changes to the Mubarak-era constitution intended to guide the Arab world's most populous nation through new presidential and parliamentary elections within six months, in a keenly fought referendum.

One person was killed and more than 100 people were wounded as Syrian security forces fired live bullets and tear gas at thousands of demonstrators in the town of Daraa on Sunday, a human rights activist at the scene said.

"The security forces backed by police fired live rounds at the demonstrators, numbering more than 10,000," the witness told Agence France Presse by telephone. "They are also firing tear gas mixed with toxic products."

Libyan leader Moammer Gadhafi said Libya's people have been armed and are ready to fight a "long war" to defeat Western forces attacking his country, in a televised audio message on Sunday.

"All the Libyan people are united. The Libyan men and women have been given weapons and bombs ... You will not advance, you will not step on this land," said Gadhafi.

Yemen's human rights minister Huda al-Baan said she has resigned in protest from the government and ruling party after at least 52 people were killed in a sniper attack on demonstrators.

Baan said in a statement late Saturday that her resignation was to protest the "massacre" of demonstrators demanding the departure of President Ali Abdullah Saleh, who has been in power since 1978.

An Iranian cargo plane en route to Syria was forced to land in Turkey's southeastern Diyarbakir airport for an inspection, security forces said Sunday.

The plane, a civilian Ilyushin, landed on Saturday night on the orders of the Turkish authorities. Military fighter planes were on standby in case the plane refused to comply.

The United States, Britain and France pounded targets in Libya with airstrikes and Tomahawk missiles on Saturday, in a campaign to prevent Moammar Gadhafi from crushing a month-old uprising against his rule.

Libyan state television said a French plane was shot down, as an official in Tripoli denounced the "barbaric aggression" despite its announcement of a ceasefire in a month-long showdown against rebels.

Jordan, Morocco, Qatar and the United Arab Emirates are the Arab nations attending Saturday's summit in Paris on action in Libya, a diplomat told Agence France Presse.

Iraqi Foreign Minister Hoshyar Zebari will also attend in his capacity as current head of the Arab League. The League's Secretary General Amr Moussa will also take part.

French President Nicolas Sarkozy, British Prime Minister David Cameron and U.S. Secretary of State Hillary Clinton held talks ahead of Saturday's summit on action in Libya, sources said.

They represent the countries at the forefront of calls for military action in Libya to prevent Moammar Gadhafi's forces attacking rebels, sanctioned by a U.N. Security Council resolution on Thursday.

Libyan leader Moammar Gadhafi has sent urgent messages to French President Nicolas Sarkozy and British Prime Minister David Cameron telling them they "will regret" interfering in the country's affairs, a spokesman said Saturday.

"If you intervene in our country you will regret it," the spokesman quoted him as telling them, adding that Gadhafi had also sent messages to U.S. President Barack Obama and U.N. chief Ban Ki-moon.

Fighting raged around Libya's rebel stronghold of Benghazi Saturday, with air strikes, shelling and anti-aircraft fire rocking the Mediterranean city as a war plane went down in flames.

Hundreds were seen fleeing the city eastwards amid unconfirmed reports that forces loyal to Libyan strongman Moammar Gadhafi had entered the western suburbs of the city of more than one million people.