Syria's main opposition National Coalition called on Lebanon to control its frontiers, after rebels said they fired across the border in retaliation against Hizbullah.

"The Syrian Coalition calls on the Lebanese government to exert control over its borders and put an immediate stop to Hizbullah's military operations on Syrian territory," the group said late Monday.

Caretaker Foreign Minister Adnan Mansour said Tuesday he was waiting for the complete file of deadly attacks on Lebanese territories from the Syrian side of the border to take the appropriate measures.

Mansour made the disclosure in a remark to al-Joumhouria newspaper when it asked him what step he was planning to take after he was tasked with filing a complaint with the Arab League to ask for its assistance in confronting the attacks.

Leaders of five U.N. agencies on Monday appealed to the international community to stop the "cruelty and carnage" in Syria, warning they may soon be forced to suspend humanitarian aid to the war-torn country.

"Needs are growing while our capacity to do more is diminishing, due to security and other practical limitations within Syria as well as funding constraints. We are precariously close, perhaps within weeks, to suspending some humanitarian support," the U.N. agency leaders warned.

The United States on Monday condemned the deadly barrage of rockets fired by Syrian rebels into the Lebanese region of Hermel, which left two people dead and five others wounded on Sunday.

The U.S. State Department said it condemns attacks against Lebanese territory, whichever side they may come from.

Syrian rebel commanders have confirmed insurgents had fired shells into Hermel towns on Saturday and Sunday, but denied there were any attacks on Monday.

"Yesterday (Sunday), Hizbullah bombarded Qusayr, Nahriyeh, Burhaniyeh and Saqarji (near the Lebanese border) from its positions in al-Qasr and Hawsh al-Sayyed Ali. They bombed civilians and killed many women and children," said Abu Oday, a commander of the rebel Independent Farouq Division.

A 38-year-old Frenchman well-known in radical Islamist circles in Belgium was killed Sunday while fighting for an Islamist brigade in Syria, Belgian media said.

Raphael Gendron left for Syria several months ago to fight with the 'Falcons of Sham' headed by Abdelrahman Ayachi who was wounded Sunday and who is the son of Syrian-born radical Imam Bassam Ayachi, the SudPresse newspaper group said in a report on its website.

A Jordanian military tribunal on Monday opened the trial of four Syrians arrested in September as they tried to cross into the kingdom heavily armed, a court official said.

"The armed forces arrested the four Syrians in a border village last year in September as they tried to cross into Jordan," the official told Agence France Presse.

Syria's air force launched several air strikes on rebel enclaves in and around Damascus, while fresh clashes between troops and rebels raged to the east of the capital, a monitoring group said on Monday.

"At least one civilian was killed in an air strike on Qaboon" in northeastern Damascus, the Syrian Observatory for Human Rights said, "while regime troops pounded the district of Jubar" in the east.

A specially equipped German military aircraft will head to Jordan on Monday to pick up 36 Syrians who were seriously wounded in the conflict in their country and fly them to Germany for treatment, the foreign ministry said.

The wounded Syrians will receive care at four army hospitals including facilities in Berlin and Hamburg, a ministry spokesman said.

United Nations Special Coordinator for Lebanon Derek Plumbly welcomed on Monday the appointment of Tammam Salam as prime minister-designate, while condemning the recent violations along the Lebanese-Syrian border.

He said: “The Security Council has now on several occasions, reiterated the importance of respect for Lebanon’s territorial integrity and sovereignty and the need for all concerned to respect Lebanon’s policy of dissociation and the Baabda Declaration,” he stressed.