Investigative analysis of ied blast in Manipur

Central Forensic Science Laboratory Kolkata receives huge number of exhibits of pre /post blast explosive mixture and parts of Improvised Explosive Devices (IEDs) from eastern and north-eastern parts of India for examination. In most of the cases low or inorganic explosive mixture were used. Forensic exhibits of Manipur IED blasts were examined by the standard techniques of chemical and instrumental analysis. The results showed that in most of the explosions, high explosives or millitary explosives like Pentaerythritol tetranitrate (PETN), 2, 4, 6-trinitro toluene (TNT), Cyclotrimethylenetrinitramine (RDX) or Ammonium Nitrate and Fuel Oil (ANFO) based were used. These were probably smuggled. But the origin of the explosive could not be detected.