The joint U.N.-Arab League peace envoy says he has a proposal to end the 21-month conflict in Syria.

Lakhdar Brahimi said Sunday in Cairo after meeting with Arab League officials he believes his plan, based on an agreement signed in Geneva earlier this year, “could be adopted by the international community.” He made no further comment on the proposal.

Brahimi said something needs to be done soon because the situation in Syria is “getting worse by the day.”

The peace envoy said Saturday in Moscow where he met with Russia's foreign minister that the choice in Syria is between “hell or the political process.” He said the world has to work “ceaselessly” for the political process.

Brahimi has warned the magnitude of the conflict in Syria could worsen if fighting engulfs Damascus, which could exacerbate a refugee crisis.

Brahimi recently called for an interim government in Syria until new elections can be held.