(VOVworld) - "Incontrovertible" test results show sarin gas or a similar substance was used in the chemical weapons attack in Syria earlier this month, the Organisation for the Prohibition of Chemical Weapons (OPCW) said Wednesday.

Young victim of the April 4th chemical attack in Khan Sheikhoun (Source:VNA)

Samples from 10 victims of the April 4^th attack were analyzed at four laboratories, OPCW head Ahmet Uzumcu said, adding that detailed reports will be released in the next few days. The same day, French Foreign Minister Jean-Marc Ayrault said France will produce proof in a few days that the regime of Bashar al-Assad launched the chemical attack.

The April 4^th attack on rebel-held Khan Sheikhoun killed at least 87 people. Western leaders have accused Assad of being behind the attack. The Syrian government categorically denies any involvement.