Syria: Full interview with Deputy Foreign Minister Faisal Mekdad
2 September 2013 Last updated at 05:03 BST
The US has said it has evidence that the chemical nerve agent sarin was used in a deadly attack in Damascus last month.
When asked if the Syrian government had used chemical weapons, Deputy Foreign Minister Faisal Mekdad told the BBC's Jeremy Bowen that they were used by Western-backed armed groups.
He said that if there was an attack by the US, terrorism would flourish everywhere.