When asked about the potential hazards if it had fallen into wrong hands, Agarwal assured that the device had gone through very rigorous tests and would not break in any accident.

He emphasised that it was radioactive but it not explosive.

Moreover, it would require specialized tools to open which are not available with the general public, he said.

'Such devices are used to test structures and welds and there is a radioactive plate on it, indicating its radioactive content,' Agarwal explained.

Agarwal said that the AERB got very prompt help and cooperation from police in recovering the radiography device.