Traces of Sarin and VX nerve agents have been found by inspectors at a Syrian military research site, according to a Reuters report.
The experts who uncovered the chemical precursors have not received satisfactory explanations from the Syrians about the discovered chemical traces, nor what was done with the sarin chemicals.
So far, the Syrian government handed over 1300 tons of chemical weapons, but continues to deny it ever used them.
The Organization for the Prohibition and Chemical Weapons (OPCW) has said that chlorine has been repeatedly used as a weapon, even after the chemical weapon stockpile was handed over, but it is not clear yet which side in the Syrian civil war used the chlorine.
After Syria had been declared “chemical-weapons free” last year, it admitted to having four more chemical weapons facilities.