Syria has rejected an Arab League call for President Bashar al-Assad to step down.
A government official described the plan as “flagrant interference” in the country’s internal affairs.
After meeting at its Cairo headquarters, the league said Assad should give way in favour of a unity government with the opposition.
But tensions within the league itself threaten to undermine its mission. Saudi Arabia has withdrawn its own monitors after accusing Syria of failing to cooperate and breaking promises on peace initiatives.
Meanwhile, violence has continued in key cities across the country with anti-Assad protestors clashing with police.
Since its observation mission began last month, the Arab League says there have been nearly 140 deaths on both sides.
Human rights groups say more than 6,000 people have been killed since Assad’s government began a crackdown on popular protests 10 months ago. The government has blamed the deaths on militants.