The 7/11 blasts have triggered simulation experiments to determine the intensity and nature of the blast by scientists from forensic laboratories across the country.
The Central Forensics Science Laboratory in co-ordination with the defence force will reconstruct important explosion sites in the country. Topping the list is the 2003 Zaveri Bazar and Gateway of India blasts other than the recent local train blasts. Defence spokesperson Captain Abhay Lambhate refused to comment.
Rukmini Krishnamurthy, director, State Forensic Laboratory, Kalina confirms, The exercise will educate forensics scientist about the modus operandi, device used, nature of explosive charges and quantity of explosives used in the blasts.
An experiment to determine details of the explosive was conducted for the first time in 1989 at Kalina in coordination with the Indian Army, when a combination of TNT (trinitrotoluene) and RDX (Rapid Detonating Explosive or Research or Development Explosive or cyclonite) was used in local train blasts in Thane, Kalyan etc, said Krishnamurthy.
According to FSL the state has experienced nearly 60 bomb blasts since 1986, and 24 strikes used high explosive materials, namely RDX, TNT, gelatin sticks, detonators and ammonium nitrate. Blast modus operandi has changed in order to mislead investigators, according to FSL.
A senior crime branch officer who probed the 2003 blasts in Mumbai explained, The usage of RDX or any other high explosive in a blast indicates the involvement of larger organisation behind the act, and usage of locally available material like gelatin sticks, detonators, ammonium nitrate etc raise suspicion about local groups being involved.
In 1991, a high explosive combination of TNT and RDX was used in the Seepz blasts and the blasts in local trains in Kalyan, Kalwa etc.
The 1993 serial blasts showed the usage of RDX with a chemical timer, while the 2002 Ghatkopar blasts showed usage of ammonium nitrate and detonators, the 2003 Gateway and Zaveri Bazar blasts showed presence of RDX and the latest local trains blasts had mixtures of RDX, ammonium nitrate and fuel oil.
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