According to top Delhi Police investigators who asked not to be named, the Ghazipur device was a tiffin bomb with three kilograms of RDX as the core charge and ammonium nitrate as a secondary charge.
Delhi Police investigators believe that the IED consignment came to India around last Independence Day.
While the Delhi Police and security agencies are trying to recover other IEDs from the consignment, HT learns that a number of these IEDs have also made their way into Gujarat through the sea route and in UP through the land route.