Turkey believes it is too soon to call for Syrian President Bashar al-Assad to step down, a government official told Agence France Presse on Friday.

"We are not there yet," the official said, speaking on condition of anonymity.

Syria's security forces killed at least 22 protesters as tens of thousands swarmed the streets after Friday prayers, activists said, piling pressure on President Bashar al-Assad after Western leaders demanded he step down.

Fifteen people, including two children, were killed in separate shootings on protesters in the southern province of Daraa, while three were killed in the central city of Homs and two in the Damascus suburb of Harasta, the Syrian Observatory for Human Rights said.

Egyptian state television said on Friday two unknown Egyptians were killed along with three policemen by Israeli gunfire the previous day when Israeli forces were tracking down militants behind deadly attacks in their territory.

Security officials had said that three policemen were killed on Thursday when an Israeli Apache gunship fired a rocket at militants it was pursuing along the border, after attacks on Israeli buses and cars killed eight.

Russia opposes Western calls for Syria's president to step down and will send a delegation to Syria to meet the opposing sides, the Interfax news agency said Friday citing a source and a lawmaker.

"We do not support such calls and believe it is now that President Bashar Assad's regime needs to be given time to implement all the reform processes that have been announced," Interfax quoted a ministry source as saying.

More than 40 Syrian "revolution blocs" have forged a coalition to unite their efforts against the regime of Bashar Assad, according to a statement received Friday by Agence France Presse.

The so-called Syrian Revolution General Commission (SRGC) said the coalition was formed due to "the dire need to unite the field, media and political efforts" of the pro-democracy movement launched in mid-March.

Spain said Friday it is joining calls for U.N. Security Council sanctions against Syria's government, blamed for at least 2,000 deaths since protests started in mid-March.

Spain is backing Britain, France, Germany and Portugal, which are preparing a sanctions resolution against President Bashar Assad's government, Foreign Minister Trinidad Jimenez said.

Strong explosions rocked Tripoli early Friday as Moammar Gadhafi's shaky regime called for a immediate ceasefire in Libya and rebels claimed control of a key oil refinery not far from the capital.

A slew of explosions were heard around 1:00 am (23:00 GMT) in the heart of the seaside capital where Gadhafi's residential complex is located, as well as in several areas in the west of the city.

Gaza militants on Friday fired 12 rockets into Israel, seriously injuring one person after a night of Israeli air strikes which killed a teenager and hurt 17 other people.

Most of them caused no injuries or damage but two struck the southern coastal town of Ashdod on Friday morning, damaging a school and a synagogue and seriously wounding two Israelis, one seriously, Israeli police and the military said.

Damascus accused Washington and the West on Thursday of seeking to stoke violence in Syria, after U.S. President Barack Obama and European leaders said that Syrian President Bashar al-Assad must step down.

"It is strange that instead of offering (Damascus) a helping hand to implement its program of reforms, the West and Obama are seeking to stoke more violence in Syria," Reem Haddad, the information ministry's director of external relations, told Agence France Presse.

An Israeli air strike on the southern Gaza town of Rafah killed six people on Thursday, Palestinian medics said, just hours after a string of deadly attacks in southern Israel.

Israeli military sources confirmed that air strikes were carried out in Gaza shortly after three attacks in southern Israel killed at least seven people.