Syrian crisis is "biggest threat to peace": U.N. envoy

The Syrian crisis is the biggest threat to world peace and security, especially in view of recent allegations regarding the use of chemical weapons in the conflict, the joint U.N.-Arab League envoy for Syria said Friday.

"The Syrian crisis is undoubtedly today the biggest threat to peace and security in the world," Lakhdar Brahimi said in an interview with the U.N. television channel.

Brahimi's statement came a few days after a rocket attack on a rebel-held suburb of Damascus that a major opposition group alleged involved the use of chemical weapons and killed 1,300.

The opposition group put the blame on President Bashar al-Assad's forces, while the Syrian military denied the claim in a statement aired by state-run television.

The attack "emphasizes the importance of this crisis and the danger it represents, not only for the Syrian people, not only for the region, but for the world," the U.N. envoy said.

In the interview, Brahimi called on all parties involved to find a negotiated outcome to the conflict, repeating the long-standing U.N. position that no military solution exists.

"The problem is that the parties that are involved in this civil war, each one of them thinks that they can win militarily," Brahimi said. "No side is going to win," he added.

Brahimi said he and his team are in the final stage of preparations for a diplomatic conference dedicated to finding a negotiated solution to the Syrian crisis that could be held in Geneva in the coming months, following up on the first such conference that took place in June 2012.