Three Palestinians were killed and an Israeli wounded in air raids and rocket fire Saturday, medics said, as the armed wing of Hamas threatened to call off an Egypt-brokered truce.

"The air raids by the Zionist enemy are new crimes. We will not stay silent in the face of the crimes," said Ezzedine al-Qassam Brigades of the Islamist movement Hamas which rules the Gaza Strip.

Turkey said Saturday its downed fighter jet may have violated Syrian airspace after Damascus confirmed shooting it down, sparking a fresh crisis amid nosediving ties between the erstwhile allies.

President Abdullah Gul said it was routine for warplanes flying at high speed to cross borders, in comments that showed signs of easing tensions in the spat over the shooting in the eastern Mediterranean.

Hundreds of Palestinians and peace activists on Friday held a protest at the West Bank village Susiya, which Israel has recently served demolition orders.

An Agence France Presse correspondent said over 500 people demonstrated at the site, located in the southernmost part of the West Bank, carrying signs against the evacuation and demolition of the 50 structures comprising the hamlet.

Yemeni security forces shot dead two people taking part in a protest in the port city of Aden on Friday for the secession of the formerly independent south, activists and a medic said.

"Security forces fired live rounds on protesters, killing two and wounding five," said Ghassan al-Shuaibi, an activist from the separatist Southern Movement.

Bahraini security forces on Friday fired rubber bullets to disperse an unauthorized rally by the opposition Al-Wefaq wounding its leader, the Shiite bloc said.

Sheikh Ali Salman was "wounded with rubber bullets in his shoulder and back when security forces fired at a peaceful demonstration held in Bilad al-Qadeem," three kilometers (two miles) from Manama, it said in a statement.

A Russian ship will make a second attempt to deliver military helicopters to Syria after docking in the northern port of Murmansk on return from its current voyage, Interfax reported on Friday.

The Alaed cargo vessel will return to Murmansk on Saturday and then set off again for the Syrian port of Tartus under the accompaniment of at least one other Russian ship, an unnamed diplomatic source told the news agency.

One Palestinian was killed and two were wounded on Friday, one seriously, when Israeli warplanes struck east of Al-Bureij in the central Gaza Strip, medics said.

International envoy Kofi Annan on Friday urged the world to raise the level of pressure on Syria's rival sides and said Iran should have a role to play in the effort.

"It's time for countries of influence to raise the level of pressure on the parties on the ground and to persuade them to stop the killing and start the talking," he told a press conference in Geneva.

The Egyptian Muslim Brotherhood's presidential candidate Mohamed Morsi said on Friday his movement wanted neither "confrontation nor violence," as the country nervously awaits the results of a divisive election.

Morsi spoke after the ruling military warned that it would deal "firmly" with any attempt to harm the public interest as thousands of people packed Cairo's Tahrir Square accusing it of a power grab.

Saudi female activists have cancelled their plan to brave a driving ban on Friday, settling instead for petitioning King Abdullah to allow them to get behind the wheel, members of their group said.

"I think that last year's attempt by ladies to drive in public has sent the message ... Now it's time to address officials to urge them to issue driving licenses to women," said researcher Hala al-Dosari.