The bomb that exploded in Bangalore Wednesday was more or less similar to the twin bombs that exploded in Hyderabad in February this year,according to the chief of National Security Guard.
Forensic experts have recovered a toggle switch that was used to trigger the explosion. Investigators said the bomb was timed to explode after 50 minutes and targeted at a police van. Investigators had not found a trigger device in the Hyderabad blasts as lot of crucial evidence was lost due to excessive movement of people and VIP visits.
Though forensic report is awaited,the preliminary findings by the NIA team that visited Bangalore Thursday have revealed that like the Hyderabad bombs this one also had no shrapnels in it.
The bomb appears to be more or less similar to the ones that exploded in Hyderabad. It had almost no shrapnel and was packed in a tin box. We have collected several such tin shards from the scene of explosion, Arvind Ranjan,DG,NSG told The Indian Express. A small crater was formed on the ground where the bomb was planted.
The bomb used in Hyderabads Dilsukhnagar was packed in an aluminium box and was placed on bicycles. The IEDs,which killed 17 people and left 117 people injured,contained high explosives but the quantity was not very much, NSG officials had said.
The bomb was triggered by an electronic detonator,which was a toggle switch. It was timed to explode in 50 minutes. Though it was not packed with any kind of shrapnel,the vehicles parked nearby acted as shrapnels, said a senior official. The bomb contained less than one kg of explosive material and most probably it was nitrate based, the official said.
We are awaiting the final report from the forensic laboratory but a preliminary analysis of the bomb revealed that it definitely contained high explosives, said the DG.
According to the National Bomb Data Centre of the NSG,48 people were killed and 261 were injured in IED blasts across the country in 2012. In addition to this 65 security personnel were killed and 158 injured in IED blasts in the same year.