The Organization for the Prohibition of Chemical Weapons announced on Wednesday that chlorine was "likely used as a chemical weapon" in an attack on a Syrian town in February.
"Such acts contradict the unequivocal prohibition against chemical weapons enshrined in the Chemical Weapons Convention", he added.
The incident is by no means the worst chemical weapons attack during the seven-year civil war, but it led to 11 people being treated for breathing difficulties.
To the OPCW, added that the mandate of MOFS is to establish the facts of use of chemical weapons or toxic chemicals and is not meant to establish responsibility for the alleged attack.
Pope Francis says 'very worried' by Mideast violence
He added: "I repeat that the use of violence never leads to peace". "War calls war, violence calls violence". Calling for "dialogue, justice and peace", Francis said violence "has never led to peace".
Most recently, a large-scale suspected chemical attack on the town of Douma killed more than 40 people in April. "Attribution was part of the mandate of the OPCW-UN Joint Investigative Mechanism, set up by the UN Security Council, which expired in November 2017", the organization said. But, the OPCW confirmed the use of chemicals in Syria in February.
"I strongly condemn the continued use of toxic chemicals as weapons by anyone, for any reason, and in any circumstances", Ahmet Üzümcü, director-general of the OPCW, said.
The team exhumed bodies as well as gathering over 100 environmental samples which are being analysed in different OPCW-designated labs. Russia, which supports Assad in the Syrian conflict, chemical attack denies and considers it a production of the West to justify a military strike on Syria.
Syria and Russian Federation have accused Syrian volunteer rescue workers of staging the April 7 video footage at the behest of the United States and its allies. The French government is due to hold a ministerial-level conference in Paris on Friday to build an alliance of countries determined to reconstruct an accountability mechanism for chemical weapons use, if necessary outside the confines of the UN.
The UK-based Syrian Observatory for Human Rights reported a "foul smell after regime helicopters struck several areas of the town in Idlib province, causing five civilians to suffer from suffocation".