The situation in Syria is "calm," requiring no repatriation of Iranian citizens there, Iranian Foreign Minister Ali Akbar Salehi said on Sunday, according to the official news agency IRNA.

"Syria is calm and Iranian nationals who are there have no problem and there is no need to conduct any special action" for them, Salehi was quoted as saying.

Turkish police fired tear gas on stone-throwing Syrian refugees who were protesting Sunday at the lack of food and water at camps on the border with their conflict-ravaged homeland.

A Turkish official said demonstrations erupted at two of the 10 camps set up along the border which are sheltering about 40,000 Syrians who have fled the escalating violence at home.

UNRWA on Sunday expressed concern over the fate of some half a million Palestinian refugees living in war-torn Syria, particularly those residing in the Yarmouk neighborhood of Damascus.

"UNRWA views with increasingly grave concern the situation in Syria, particularly as regards the implications for the stability and protection of 500,000 Palestine refugees across the country," the agency said.

Turkey sent batteries of ground-to-air missiles to the border with Syria on Sunday, media reports said, boosting its firepower as rebels in Syria seized several border posts.

As fighting raged in Damascus and Aleppo, rebels were said to have taken control of three crossing points on the border with Turkey, which is sheltering thousands of Syrians who have fled the conflict at home.

Syrian President Bashar Assad on Sunday received his newly appointed army chief-of-staff General Ali Ayyoub, state television reported.

"President Assad met chief-of-staff General Ali Ayyoub and gave him his instructions," the broadcaster reported.

A wheelchair-bound Israeli was in serious condition on Sunday after setting himself on fire just hours before the funeral of a man who had set himself alight during a social justice protest on July 14.

"A man in a wheelchair set himself on fire at a bus stop near Yehud" near Tel Aviv, police spokesman Micky Rosenfeld told Agence France Presse.

Assailants on the Egyptian side of the border with Israel opened fire at a bus carrying Israeli soldiers on Sunday, causing no casualties but damaging the vehicle, an Israeli military spokeswoman said.

"Fire was opened at an Israeli army bus carrying soldiers," she told Agence France Presse. "Nobody was injured but damage was caused to the bus."

Syrian rebels' seizure of crossings along the frontier with Iraq marks a blow to Bashar Assad's regime, but has also divided communities that have long straddled the border.

Of the three main crossings between Syria and Iraq, rebels have maintained control over the al-Bukamal border point since Thursday evening, and briefly held the Yarabiyah crossing along the northern part of the two countries' frontier.

Israel on Sunday again asked the Supreme Court for more time to evacuate the Migron settlement outpost, which the same court has ordered razed by August 1.

The request for a one-month extension to August 30, a copy of which was seen by Agence France Presse, was backed by the regional military commander who said the need to maintain order in the West Bank during the holy Muslim fasting month of Ramadan justified the delay.

Saudi Arabia has called for an extraordinary summit of Muslim leaders to be held next month to address risks of "sedition" threatening Muslim countries, state news agency SPA reported on Sunday.

Saudi King Abdullah has called for "an extraordinary Islamic solidarity meeting to ensure... unity during this delicate time as the Muslim world faces dangers of fragmentation and sedition," SPA quoted Foreign Minister Saud al-Faisal as saying.