Ponte 'stupefied by Syria sarin use'
A leading United Nations investigator says she is 'stupefied' by the testimony from victims of the Syrian conflict that rebels have used nerve agent sarin.
Carla Del Ponte told Swiss TV there were "strong, concrete suspicions but not yet incontrovertible proof".
She said her panel had not yet seen evidence of government forces using chemical weapons.
- From the section Middle East