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Syrian regime responsible for chemical attack - Nato

2 September 2013 Last updated at 17:01 BST

Nato Secretary General Anders Fogh Rasmussen has said he is personally convinced that a chemical attack took place in Damascus, and that the government of President Bashar al-Assad was responsible.

There must be "a firm international response to deter any future use of such weapons", he said, or else it would send a "dangerous signal to dictators all over the world".