The white powder found in the Uttar Pradesh state assembly might not be the powerful plastic explosive known as pentaerythritol tetranitrate (PETN) as earlier claimed by Chief Minister Yogi Adityanath, citing an initial forensic report from a lab in Lucknow.
Sources in the Vidhan Sabha have also indicated that the Agra forensic lab has found no traces of any explosive in the powder and that the samples have now been sent to Hyderabad for testing.
Reports say that Director of state Forensic Science Laboratory, Shiv Bihari Upadhyay allegedly tested the substance using an explosive detection kit whose usage date had expired in March 2016 itself. Director, Vigilance, Hitesh Awasthi will probe the charges, the official said.
There were also complaints against Upadhyay pertaining to irregularities during his tenure as the acting director of a laboratory in Patna, Bihar, from February 28, 2008, to August 20, 2012, Principal Secretary (Home) Kumar said.
Pentaerythritol tetranitrate or PETN can easily dodge metal detectors and its colourless crystals are hard to detect in sealed containers. It is a powerful explosive, 100 gram of which is enough to blow up a car to pieces, say experts.