Arab foreign ministers are meeting in Cairo on Sunday to decide their next move after a resolution on Syria failed in the UN Security Council last week.
Officials say the ministers could discuss a joint observer mission with the UN and recognition of the main opposition group.
Syrian government forces have continued to bombard the city of Homs.
Meanwhile, Al-Qaeda's leader has backed the Syrian uprising.
In a video message, Ayman al-Zawahiri told the opposition not rely on the West or Arab countries for support.
Zawahiri - who took over the leadership of al-Qaeda following the death of Osama Bin Laden in May 2011 - described the Syrian government as a "cancerous regime that suffocated the free people of Syria".
He called on Muslims to offer whatever help they could. Read More