Janjivan Bureau / Lucknow : A high-level meeting was called by Uttar Pradesh Chief Minister Yogi Adityanath on Friday after 60 grams of suspicious white powder was found in the state assembly. The powder was found to be Pentaerythritol tetranitrate or PETN, a chemical used in explosives. Uttar Pradesh Assembly Uttar Pradesh Assembly Speaking in the Assembly on Friday, Chief Minister Yogi Adityanath called for an NIA investigation. “PETN explosive was found and action must be taken against those involved. NIA must investigate this…Security guidelines must be issued and everyone must follow them,” CM Adityanath told the assembly after the meeting. “Strong security system must be established as this could be a terror conspiracy,” he added.