Syria's opposition will consult with backers Saudi Arabia, Qatar and Turkey before it decides whether to take part in a peace conference proposed by the United States and Russia, its acting chief said Monday.

"It is too early to decide whether or not we will take part, because the circumstances of this conference are not yet clear. There is no agenda or calendar yet," said the opposition National Coalition's acting head George Sabra.

Russia on Monday condemned the twin weekend bombings near Turkey's border with Syria that Ankara blamed on groups close to the Damascus regime, calling for a thorough investigation.

"We strongly condemn these terrorist acts," the Russian foreign ministry said, expressing condolences to the victims of the "barbaric crime" that killed 48 people near the town of Reyhanli.

The deadly blasts that shook Turkey at the weekend will only spur Ankara to press harder for global action against the Syrian regime, analysts say, as fears grow that the country is being dragged into the spiraling conflict.

At least 48 people were killed Saturday in twin blasts in the town of Reyhanli, near the Syrian border, in an attack Turkey claims was masterminded by a group linked to embattled Syrian President Bashar Assad, though Damascus rejects the allegation.

President Michel Suleiman voiced on Monday his support to an initiative proposed by the Phalange party, which focuses on introducing a constitutional amendment, which calls for neutrality and dissociate the country from the conflicts surrounding it.

“The initiative became a necessity during the current developments in the region,” Suleiman said after talks with a Phalage party delegation at the Baabda Palace.

Taliban insurgent leaders pledged on Monday to release the final four Turkish engineers held hostage since their helicopter crashed in eastern Afghanistan last month.

Four other Turkish engineers aboard the helicopter were freed on Sunday, three weeks after the crash in Logar province, a Taliban stronghold south of the capital Kabul.

General Security chief Maj. Gen. Abbas Ibrahim on Sunday returned to Beirut from Damascus after he was promised by Syrian authorities that they will help resolve the case of the abducted Lebanese pilgrims, Lebanon's National News Agency reported.

Ibrahim “met with a number of Syrian officials and discussed with them the case of the Aazaz abductees, handing them a list containing the names of Syrian women prisoners that he had received from Turkish authorities,” NNA said.

Iraqi Prime Minister Nouri al-Maliki on Sunday condemned bombings in Turkey that killed dozens of people, saying they provide an additional incentive for international cooperation in fighting terrorism.

"The Iraqi government expresses its... strong condemnation of the criminal bombings in the Turkish town of Reyhanli and expresses its solidarity with the... Turkish people and the families of the innocent victims," Maliki said in a statement on his website.

Turkish Prime Minister Recep Tayyip Erdogan charged Sunday that Syria was dragging his country down a "vile path" with attacks such as the twin car bombings in the town of Reyhanli, near the Syrian border, that claimed 46 lives.

"They want to drag us down a vile path," Erdogan said at a rally in Istanbul, urging Turks to be "vigilant... and level-headed in the face of each provocation aimed at drawing Turkey into the Syrian quagmire."

Key opposition group the Syrian National Council on Sunday echoed Ankara's accusation that supporters of President Bashar Assad's regime were behind twin car bomb attacks in Turkey that killed dozens a day earlier.

"The Syrian National Council condemns in the strongest terms the cowardly crimes carried out by collaborators of the Syrian regime in the Turkish town of Reyhanli," said the group, an influential faction within the leading opposition National Council.

Damascus on Sunday denied accusations it was behind twin car bomb attacks that left at least 46 people dead in a Turkish town near the Syrian border, as Ankara arrested nine people in the probe.

Cranes were seen lifting debris from buildings destroyed by Saturday's blasts in Reyhanli, one of the main Turkish hubs for Syrian refugees and rebels.