U.N. Security Council members have been moved to tears by a graphic eyewitness account of the latest suspected chlorine attacks on civilians in Syria.

A Syrian doctor who treated victims from a half-dozen attacks over the past month gave the council its first briefing on the attacks Thursday and later spoke to reporters.

He will meet Friday with Russia's U.N. delegation as attempts continue to persuade the Syrian government's top ally to stop using its veto power against proposed action on the four-year conflict.

Another doctor at the briefing said every country in the 15-member council brought up the need for accountability in the sometimes deadly attacks, except for Russia and allies China and Venezuela.

The council last month approved a resolution condemning the use of toxic chemicals in Syria.