Blast in Delhi: Explosion reported outside CRPF school in Rohini
The explosion outside the CRPF Public School in Delhi’s Rohini earlier today was a directional blast and heard at least two kilometres away from the site, sources said.
The explosives were positioned in a manner to create a shockwave effect, which shattered windows of adjoining buildings and vehicles during the blast.
According to initial investigation, the solid or liquid explosive material, in such cases, is converted to very hot, dense and high-pressure gas, sources said.
The explosive products initially expand at very high velocities in the surrounding air, causing shockwaves due to reflective pressure, they added.
A shockwave consists of highly compressed air, travelling radially outward from the source at supersonic velocities, sources further said, adding that windows of adjoining buildings and vehicles were shattered precisely due to this phenomenon.
According to sources, no metal-like substances, ball bearings or electronic devices were found at the site and the wall of the school was used for the explosion.
Sources said the blast possibly occurred to give a message due to various shops which are present in the area.