The NIA officers quizzed one of the suspects - who was arrested on November 10 - in connection with the October 2 blast for information on the explosives.

The suspect said he had stashed the bottles in a small shop in the semi-urban colony of Khargagarh.

When the NIA officers went to the shop and spoke to the shop-owner, he said he had thrown the bottles in a nearby pond.

The shop-owner was detained for questioning.

It has been alleged that a Jamaat-ul-Mujahideen Bangladesh ultra named Sheikh, employed with a medicine company, had obtained the acids used for making the explosives.

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