Progressive Socialist Party leader MP Walid Jumblat said on Wednesday Hizbullah's interference in battles in Damascus would “tarnish its image,” pointing out that the Syrian people don't need Jihadists from Lebanon or any other country to back its revolt.

“As the situation in Syria is deteriorating and the Lebanese are plunging in this swamp, officials should reiterate importance of abiding by the dissociation policy,” Jumblat said in a statement.

A senior civil servant at Syria's electricity ministry was killed by a magnetic bomb attached to his car on Wednesday in central Damascus, state news agency SANA reported.

"As part of a campaign of assassinations... terrorists fatally wounded Wednesday morning Mohamed Abdel Wahab Hassan, the director of planning at the electricity ministry, with an explosive device attached to his car," SANA said.

Aleppo's Greek Orthodox archdiocese said Wednesday it had no news on two Orthodox bishops kidnapped in Syria, a day after a Christian association said the two men had been released.

"We have no new information," Ghassan Ward, a priest at the archdiocese, told Agence France Presse.

Syrian rebels battled regime troops inside the Minnigh military airport in the north of the country for the first time on Wednesday, the Syrian Observatory for Human Rights said.

"The rebels, who have laid siege to the airport for months now, entered it for the first time around dawn," Observatory director Rami Abdel Rahman told Agence France Presse.

Lebanese group Hizbullah's decision to fight openly alongside the Syrian regime will increase Lebanon's involvement in Syria's conflict, despite a policy of neutrality, analysts say.

But despite inflaming tensions, the country is unlikely to face serious instability as a result, because none of its political forces have an interest in such a scenario for now, they say.

Controversial Salafist cleric Sheikh Ahmed al-Asir stressed that he will not withdraw his call for jihad in Syria, urging scholars and clerics to approve his fatwa to aid “the oppressed” in the town of al-Qusayr, southeast of Homs.

“We should establish secret defense cells to defend ourselves in case (Hizbullah chief Sayyed Hassan) Nasrallah decided to start battles in Lebanon similar to what's happening in Syria,” Asir told reporters.

U.S. Secretary of State John Kerry said Israeli Prime Minister Benjamin Netanyahu had not been able to confirm to him on Tuesday that the Syrian regime had used chemical weapons against rebels.

"I think it is fair to say (the prime minister) was not in a position to confirm that in the conversation," Kerry said, explaining that he had telephoned Netanyahu following reports of their use.

Free Patriotic Movement leader MP Michel Aoun on Tuesday blamed the abduction of two Christian bishops near Aleppo on "the countries that are fueling the war" in Syria.

"We want to know the objectives of the Arab Spring after the destruction of churches in Egypt, Tunisia, Libya, Syria, Israel and Iraq. Why are they targeting landmarks and committing abductions," Aoun said in an interview on his movement's mouthpiece OTV.

U.S. Secretary of State John Kerry and his Russian counterpart Sergei Lavrov discussed the deteriorating situation in Syria on Tuesday, stressing the need for a political solution, a U.S. official said.

The two have met several times since Kerry took office earlier this year, with Syria a growing cause of international concern amid fears the bloody conflict could spill over into an already volatile region.

Al-Mustaqbal parliamentary bloc on Tuesday rejected calls voiced by Lebanese Sunni clerics for “jihad” in the Syrian region of Qusayr, while urging Hizbullah to “withdraw its fighters” from the war-torn country.

In a statement issued after its weekly meeting, the bloc said the line-up of Prime Minister-designate Tammam Salam's cabinet "must be based on the rotation of portfolios" among the various political parties.