With eye witnesses giving contrasting claims, initially there were claims made that the explosives were placed in a briefcase, but others injured in the blast revealed to the National Investigation Agency (NIA) that they were placed in a bag. Of vital importance is the statement given by a person who is understood to have stood close to the explosive.
An NIA official commented, "We will be talking to other injured victims also once their health improves." Senior NIA officials have reviewed the investigations with the Home Ministry officials. The NIA trying to recreate the scene of the blast to ascertain the exact nature of the blast. The forensic report pertaining to this is expected on Tuesday.
There are also reports that ammonium nitrate alone could not have caused such a massive impact. An official stated, "Without PETN or RDX having been used, ammonium nitrate on its own could not have caused such severe impact."
Meanwhile, probe is on over the four different terror emails received that had claimed responsibility for the blast. The police had arrested a person from Gujarat for sending across a hoax email to the Delhi Police.