The head of a global arms watchdog said that incontrovertible test results from an alleged chemical strike in Syria showed Sarin gas or a similar substance had been used.

Head of the organisation for the prohibition of chemical weapons said Ahmet Uzumcu said samples from 10 victims of the April 4 attack on khan Sheikhun Analysed at four laboratories that indicate exposure to Sarin or a Sarin-like substance.
He said the analytical results already obtained are incontrovertible.