At least 10 young Dutch citizens suspected of wanting to become jihadist fighters in Syria's deadly conflict have been refused passports over the "last months", the government's anti-terror organization said on Friday.

"It is a very effective way to prevent them from leaving," Jochgem van Opstal, spokesman for the National Anti-Terror and Safety Coordinator (NCTV) agency told Agence France Presse.

Fierce clashes raged Friday between Syrian troops and rebels in northeastern Damascus as government warplanes raided insurgent strongholds, a monitoring group said.

The Britain-based Syrian Observatory for Human Rights said at least seven rebels were killed in regime shelling and air raids in the district of Jobar.

The brother of a member of Syria's opposition delegation to the failed Geneva II peace talks was arrested Friday at a security checkpoint in Damascus, an opposition source told Agence France Presse.

"The Syrian authorities have arrested Mahmud Sabra, the 34-year-old brother of lawyer Mohammed Sabra, a member of the opposition delegation to the Geneva talks," said the source, who asked not to be identified.

The U.N. refugee agency on Friday urged countries outside the Middle East to open their doors to 100,000 Syrians who need to find a haven outside their conflict-struck region.

The call from the United Nations high commissioner for refugees follows an earlier appeal to developed countries to grant a new home to 30,000 of the most vulnerable Syrians driven from their country.

Former premier Fouad Saniora, head of the al-Mustaqbal parliamentary bloc, urged Hizbullah on Friday to “return to Lebanon” and end its military intervention in neighboring Syria, which the party argues is necessary to protect Lebanon from extremist attacks.

“We believe that there is an essential need for Hizbullah's return to Lebanon, as this move would make it gain a lot through enhancing its ties with all the components of the Lebanese people and putting an end to the excuses used by some parties to carry out suicide attacks, which we condemn and reject,” Saniora said as he inspected renovation works in downtown Sidon.

Damascus condemned on Friday the “terrorist operation” targeting Lebanon, stressing on its readiness to cooperate with Lebanese authorities to “fight terrorism.”

"We are ready to cooperate with the Lebanese Ministry of Interior to fight terrorism, persecute terrorists, and to seize criminal tools that are destabilizing Lebanon, Syria and the entire region,” the Syrian Interior Ministry said in a released statement.

Rockets and shells fired from the Lebanese-Syrian border area landed in several regions in northern Bekaa on Friday.

"Three rockets fired from the Eastern Mountain Range (on the Lebanese-Syrian border) have landed in the hills between the towns of al-Ain and al-Fakiha in Baalbek, causing no casualties," state-run National News Agency reported in the evening.

A group of 38 male evacuees from besieged parts of the Syrian city of Homs were released Friday after investigation, leaving almost 200 others still being held, the provincial governor said.

The men and boys were among those detained by security services for questioning after being evacuated from the Old City of Homs by the U.N. and Red Crescent under a deal including a temporary ceasefire.

A resident to the Bekaa city of Baalbek was held captive in Syria's Qalamoun region, the state-run National News Agency reported on Thursday.

The family of Samir Hlayhel received a phone call from a Syrian number informing them that their son has been taken to the town of Yabrud in Qalamoun.

Syria will miss a U.N.-backed June 30 deadline to destroy its chemical arsenal, possibly by several months, sources said Thursday, amid growing Western frustration with Damascus' perceived delays.

With just 11 percent of Syria's chemicals out of the country after a series of missed deadlines, an Organization for the Prohibition of Chemical Weapons (OPCW) meeting on Friday will hear calls for Syria to do more.