Ten days after the July 23 blasts, the Kalina Forensic Science Laboratory (FSL) confirmed that ammonium nitrate and fuel oil were used in the explosives at Opera House, Zaveri Bazaar and Dadar.
The FSL has so far not found any traces of RDX or other explosives from the samples in their preliminary tests, confirmed an official from the FSL requesting anonymity. The official added that the ammonium nitrate and fuel oil along with a detonator were enough to trigger the explosions.
“We have sent our preliminary report based on the exhibits sent to us. However since we are receiving exhibits even now, the process of testing them will go on for some time,” the official said.
The FSL has sent some of the exhibits received from the blast site to its Pune branch, where they have advanced technology, the official added.
“We are receiving several exhibits that were taken from the spot by various investigative agencies, primarily the National Investigation Agency and the National Security Guard (NSG). In addition to these agencies, some of the samples taken by the Central Forensic Science Laboratory have also been sent to us. We will provide the official forensic report to be used in court,” added the official.
A total of 22 people had been killed in the blasts that went off in the city on July 13 at Opera House, Zaveri Bazaar and Dadar.