Foreign Minister Alain Juppe also described Syria's exiled opposition National Council as "the legitimate partner with which we want to work," the biggest international endorsement yet for the nascent opposition body.

A spokesman for European Union foreign policy chief Catherine Ashton said the EU was ready to engage with the Syrian National Council and other opposition groups, but stressed the need for them to maintain a peaceful, non-sectarian approach.

Asked at a news conference on November 23 after meeting the SNC president if a humanitarian corridor was an option for Syria, Juppe ruled out military intervention to create a "buffer zone" in northern Syria but suggested a "secured zone" may be feasible to protect civilians and ferry in humanitarian aid.

Further details of the proposal were not immediately available. Until now, Western countries have imposed economic sanctions on Syria but have shown no appetite for intervention on the ground in the country, which sits on the fault lines of the ethnic and sectarian conflicts across the Middle East.