The crisis in Syria has deteriorated sharply, the international peace envoy for the country has said.
Lakhdar Brahimi, though, said he believed a solution was still possible in 2013 under the terms of a peace plan agreed in Geneva in June.
Speaking at the Arab League in Cairo, Mr Brahimi said he hoped a resolution could be achieved before the second anniversary of the crisis comes to pass in March.
"A solution is still possible," he said. "But (it) is getting more complicated every day."
More top news
The man who sold himself to the American people as the greatest deal maker in history is now overseeing paralysis.
The US government has shut down for the first time since 2013 after Congress failed to resolve a standoff over immigration and spending.
A medical examiner concluded that an accidental overdose had caused Tom Petty to suffer a fatal heart attack at his Malibu home in October.