Jordan 'seeks exception'
Meanwhile, Al Jazeera's Nisreen El-Shamayleh, reporting from neighbouring Jordan, said she was hearing that the Jordanian government was asking the Arab League to be excluded from imposing sanctions because of the economic losses involved.
"Jordan is concerned about stopping flights between Damascus and Amman and about a high volume of trade between the two countries, amounting to $400 million per year", she said.
"Nonetheless, Jordan says that as a government it supports the Arab consensus on punitive measures but it does not want to cut its bilateral economic ties."
Iraq and Lebanon have already said they will not impose sanctions on their neighbour.
US Assistant Secretary of State Jeffrey Feltman said monitors were needed to keep a check on the forces of Syrian President Bashar al-Assad.
"We believe that in full light of monitors and media, the security services reporting to Assad and his clique would not be able to operate the way they are operating now," he said in Jordan.
Allowing in monitors would be a "peaceful way of trying to stop this sustained cycle of violence that Assad seems committed to turning Syria into," Feltman said.
He accused Assad of forcing his minority Alawite sect, which has a tight grip on the country's military and security apparatus, into a bloody conflict with the country's majority Sunnis.
"Bashar al-Assad is the one who is deepening the sectarian hatred. He seems to be intent on fulfilling his own prophecy that Syria is going to move into chaos and civil war,"
Feltman said Washington has been in touch with Syrian Christians to prod them "not to stand on the side of the attacker," but declined to elaborate.
Many among Syria's Christian and other minorities have sided with Assad, fearing they would be targeted if the Sunni majority takes over.
Authorities blame Sunni "extremists" and a foreign-backed conspiracy for the violence and the killing of more than 1,100 soldiers and police.
Meanwhile, activists say November was the bloodiest month since the uprising started in March, with more than 700 civilians killed.
A majority of Sunday's deaths were reported in Homs province, which has become a focal point of the country's unrest.
The United Nations' top human rights forum on Friday condemned Syria for "gross and systematic" violations by security forces, including executions and the imprisonment of about 14,000 people.
Syria dismissed the UN vote as "unjust" and "prepared in advance by parties hostile to Syria" in a foreign ministry statement carried by SANA.
More than 4,000 people have died since protests broke out in March, according to the United Nations, which says the violence in Syria is taking the shape of a civil war.
Most foreign media have been banned from Syria, making it difficult to verify reports.