PETN: Here's why sniffer dogs couldn't detect this dangerous explosive

This is PETN (Pentaerythritol Tetranitrate), this is a dangerous substance: Yogi Adityanath

The PETN explosive found lying under the seat of a Samajwadi Party MLA inside the UP Assembly is one of the most dangerous plastic explosives available in the black market and preferred by militants as the colourless crystals easily surpass security checks.

The packet, which weighed around 150 g, was found close to the seat of Leader of the Opposition Ram Govind Chaudhary, which is close to the podium where the Speaker sits.

"This is PETN (Pentaerythritol Tetranitrate), this is a dangerous substance," Chief Minister Yogi Adityanath told a stunned House soon after it assembled for the day.