GENEVA — The head of a U.N. commission investigating war crimes in Syria says it investigating who was responsible for 14 suspected chemical weapon attacks.
Commission chairman Paulo Sergio Pinheiro says the Geneva-based U.N. probe has not yet determined the exact materials used but is awaiting evidence from a separate team of U.N. chemical weapons inspectors expected to be made public later Monday.
He emphasizes the "vast majority" of casualties in Syria's civil wars is from conventional weapons such as guns and mortars.
Pinheiro said Monday that the commission believes President Bashar Assad's government has committed war crimes and crimes against humanity, while it believes that rebel groups have perpetrated war crimes but not crimes against humanity "because there is not a clear chain of command."
U.N.: 'Convincing evidence' of Syria chemical attack
U.N. 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.
A report from the inspectors says "the environmental, chemical and medical samples we have collected provide clear and convincing evidence that surface-to-surface rockets containing the nerve agent sarin were used ... in the Ghouta area of Damascus" on Aug. 21.
"The conclusion is that chemical weapons have been used in the ongoing conflict between the parties in the Syrian Arab Republic ... against civilians including children on a relatively large scale," the inspectors said on the first page of their report to Secretary-General Ban Ki-Moon.
Ban is scheduled to present the report to the U.N. Security Council on Monday.