Some 7,000 Syrian refugees have massed on the border with Turkey, waiting for more camps to be set up to accommodate those fleeing the fighting in Syria, a Turkish diplomat told Agence France Presse on Monday.

"5,000 refugees are waiting on Syrian side of the Oncupinar border crossing in Kilis province and 2,000 others at Reyhanli in Hatay province," said the diplomat.

A rebel Free Syrian Army group claimed it had shot down an army helicopter in Damascus on Monday and that the pilot had been killed, a spokesman said.

"It was in revenge for the Daraya massacre," Omar al-Qabooni, a spokesman for the Badr Battalion in Damascus told Agence France Presse via Skype, referring to the reported killing of at least 320 people in a town southwest of Damascus during a five-day government offensive.

At least 14 more bodies have been found in the town of Daraya near Damascus after activists reported a gruesome "massacre" there in a five-day assault by regime forces, a watchdog said on Monday.

The Syrian Observatory for Human Rights had reported on Sunday the discovery of 320 bodies in Daraya after what opposition militants said was a brutal onslaught of shelling, summary executions and house-to-house raids by government troops.

Egypt on Sunday defended its idea of forming a regional contact group on Syria which would include Iran, a staunch Damascus ally, insisting that Tehran could "be part of the solution" to the Syrian crisis.

President Mohammed Morsi proposed at this month's Organization of Islamic Cooperation summit in Mecca creating such a group made up of Egypt and Iran, as well as Saudi Arabia and Turkey, two countries supporting the rebels fighting President Bashar Assad's regime.

Israeli police said on Sunday that they had arrested three minors from the West Bank settlement of Bat Ayin on suspicion of an August 16 petrol bomb attack which injured six Palestinians, one badly.

"Police have arrested three suspects, all of them between the ages of 12 and 13... under suspicion of being connected with the incident two weeks ago in which a Molotov cocktail was thrown at a Palestinian taxi," police spokesman Micky Rosenfeld told Agence France Presse.

Jordan on Sunday barred pro-Palestinian U.S. and European activists from trying to cross into the West Bank for delivering school supplies to students.

"Two buses carrying 100 activists were not allowed to leave the Jordanian side" of Allenby Bridge Crossing, also known as King Hussein Bridge between the West Bank and Jordan, Walid Atallah, a spokesman for the "Welcome to Palestine" campaign in Jordan, told Agence France Presse.

Syrian President Bashar Assad said on Sunday the foreign "conspiracy" against his country would be defeated, as his forces were accused of a bloody rampage in a town near Damascus that left hundreds dead.

"The Syrian people will not allow this conspiracy to achieve its objectives" and will defeat it "at any price," Assad said during a meeting in Damascus with a top official from Iran, Syria's chief regional ally.

Britain expressed grave concern on Sunday at reports that several hundred bodies have been found in a town near Damascus following a fierce assault by the Syrian army.

"I am deeply concerned by emerging reports of a brutal massacre of civilians in Daraya, in the outskirts of Damascus," said junior foreign minister Alistair Burt.

Syrian Prime Minister Wael al-Halqi and Foreign Minister Walid Muallem will attend the August 30-31 Non-Aligned summit in Tehran, a top Iranian official announced in Damascus on Sunday.

Aladin Borujerdi, the head of the Iranian parliament's foreign policy committee, on a visit to Damascus, said that Syrian President Bashar Assad informed him at a meeting that Halqi and Muallem would attend the NAM summit.

President Bashar Assad said on Sunday that Syria would defeat what he described as a foreign plot being waged against the country, according to the official SANA news agency.

"The Syrian people will not allow this conspiracy to achieve its objectives" and will defeat it "at any price," Assad said.