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.

Syrian rebel forces occupied a second border post with Turkey on Sunday, three days after taking control of the frontier crossing of Bab al-Hawa, while Syrian forces regained control of a border crossing along the northern frontier with Iraq.

Amateur video distributed by the Syrian Observatory for Human Rights watchdog group showed armed men carrying the flag of the Syrian uprising at the Al-Salama border crossing.

One more Syrian general crossed into Turkey overnight, bringing to 25 the number of generals who have fled the unrest in Syria, a foreign ministry diplomat told Agence France Presse on Sunday.

Turkey has given sanctuary to dozens of army defectors who have formed the Free Syrian Army in opposition to President Bahsar Assad's regime.

A Syrian force infiltrated on Sunday into Lebanon’s eastern border region of Masharii al-Qaa and opened sporadic fire among the residents of the area.

Security sources told MTV channel that the Syrian force is formed of 30 troops and infiltrated 500 meters into Lebanese territories.

A top U.S. official said on Sunday that Washington has given $100 million in aid to Jordan to help host tens of thousands of Syrians who have fled the unrest back home and taken refuge in the kingdom.

U.S. ambassador to Jordan, E. Jones, said that the U.S. aid will also help Jordan meet its growing energy needs in light of the repeated cut-offs occurring from unstable gas supplies from Egypt.

More than 19,000 people have been killed in violence in Syria since the outbreak of an anti-regime revolt last year, the Syrian Observatory for Human Rights said on Sunday.

"At least 19,106 people, most of them civilians, have been killed since March last year," the Observatory's Rami Abdel Rahman told Agence France Presse.

Feared forces headed by President Bashar Assad's brother used helicopters Sunday in a new offensive against rebels in Damascus, as clashes also raged in Syria's second city Aleppo, activists said.

The Fourth Brigade headed by Maher Assad was leading the assault in the Damascus neighborhood of Barzeh, triggering an exodus of residents, said the Syrian Observatory for Human Rights.

Hizbullah denied on Sunday that it would transfer chemical weapons from Syria to Lebanon if the regime of President Bashar Assad collapsed, the Kuwaiti al-Rai newspaper reported.

“It’s not the intention of Hizbullah to acquire such weapons, and Syria isn’t willing to export any for several reasons,” a source close to Hizbullah told the daily.

Dozens of Turkish truck drivers on Saturday accused Free Syrian Army rebels of having burned and looted their lorries as they captured a border post in Syria from government troops.

A group of truck owners, traders and transporters who have braved Syria's highways despite the bloody conflict have been waiting since Friday at Turkey's Cilvegozu border crossing, opposite Syria's Bab al-Hawa post.

Prime Minister Najib Razak said Malaysia will immediately evacuate its nationals from strife-torn Syria and shut its mission there in response to the worsening security situation.

Foreign Minister Anifah Aman had sought Najib's approval to evacuate Malaysians as violence escalated across Syria.