Al-Qaida's representative in Syria was killed Sunday in a suicide bombing, the rebel Islamic Front announced on its Twitter account.

Abu Khalid al-Souri, who was appointed last year by al-Qaida chief Ayman al-Zawahiri as his representative, died in the northern city of Aleppo, said the group.

Syria said Sunday it is ready to cooperate with a rare U.N. Security Council resolution to allow humanitarian access, so long as it respects "state sovereignty."

The foreign ministry also said that the "root causes" of the humanitarian crisis must be treated, singling out "foreign-backed terrorism" and sanctions placed on President Bashar Assad's regime by Western and Arab countries.

Syrian dissident writer and journalist Akram Bunni has been arrested by the security forces, his brother, a prominent rights lawyer, told AFP Sunday.

The 58-year-old Christian former political prisoner who had been forbidden from leaving the country, "was arrested at noon Saturday in the heart of Damascus by the state security services," Anwar Bunni said.

A car bomb explosion hit a hospital on Syria's border with Turkey Sunday, killing two people and wounding several more, a monitoring group said.

A teenager and a medic working with rebel groups were killed in the car park blast close to the Orient hospital near the rebel-held border town of Atmeh, the Syrian Observatory for Human Rights said.

Saudi Arabia is in talks with Pakistan to provide anti-aircraft and anti-tank rockets to Syrian rebels to try to tip the balance in the war to overthrow President Bashar Assad, a Saudi source said Sunday.

The United States has long opposed arming the rebels with such weapons, fearing they might end up in the hands of extremists, but Syrian opposition figures say the failure of Geneva peace talks seems to have led Washington to soften its opposition.

The U.N. Security Council adopted a unanimous but non-binding resolution Saturday calling for humanitarian aid convoys to be allowed access across war-torn Syria, but diplomats immediately voiced doubt about its effectiveness.

Syria's staunch ally Russia, with support from China, has blocked three previous resolutions aimed at pressuring the Damascus regime since the crisis began in March 2011, with an estimated half of all Syrians urgently awaiting immediate help.

U.S. Ambassador to Lebanon David Hale discussed on Saturday the latest developments with Lebanese Forces leader Samir Geagea as the party's parliamentary bloc stressed the importance of adopting the Baada Declaration and Bkirki Charter as basis of the cabinet's ministerial policy statement.

According to a statement issued by the LF press office the meeting was held for an hour in Maarab in presence of Elie Khour, Geagea's adviser.

Syria's air force staged more air raids Saturday on the key rebel-held bastion of Yabrud north of Damascus, as clashes also raged on the capital's outskirts, a monitoring group said.

The Syrian Observatory for Human Rights also said that in the northeast, Kurdish fighters seized the town of Tal Barak from jihadists.

The residents of the Bekaa border town of Arsal contacted several March 14 alliance officials to rebuke arrests carried out by a Hizbullah checkpoint erected on the outskirts of the village, al-Joumhouria newspaper reported on Saturday.

According to the newspaper, Hizbullah members detained several residents from Arsal and questioned them, which angered the residents of Arsal.

The executive council of the Hague-based watchdog tasked with destroying Syria's chemical weapons arsenal failed Friday to reach agreement on what to do about Damascus's delays, because of divisions between Syria's allies and the West.

Different sources close to the talks at the Organization for the Prohibition of Chemical Weapons (OPCW) said China, Iran and Russia wanted flexibility over the timetable, but the United States and the European Union insisted on being strict.