联合国：证据显示有人在叙利亚动用化武

United Nations inspectors say there is "clear and convincing evidence" that chemical weapons were used on a relatively large scale in an attack last month in Syria that killed hundreds of people.

News agencies are reporting the inspectors said collected environmental, chemical and medical samples show "that surface-to-surface rockets containing the nerve agent sarin were used in the Ghouta area of Damascus'' on August 21.

The inspectors were charged with determining if chemical weapons were used and not who unleashed them. The U.S. says Syrian forces were behind the attack which Washington says killed more than 1,400 last month.

Syria says it was rebel fighters, not government forces, who are responsible.