Kanwar Pal Singh Gill, who as director general of Punjab police is credited with putting an end to insurgency in the state, has said new and more deadly explosive mixtures are now available in the market which are more lethal than RDX. He was speaking to rediff.com from the officers mess in Raipur; the Chattisgarh police has hired him for its counter-naxalite operations.

"It would be very difficult from here to say whether or not RDX was used in the Mumbai blasts. But these days more deadly explosives are available in the market and forensic examination would establish what kind of explosive was used by the terrorists," he said.

Gill ruled out the involvement of a large number of terrorists as there was a danger of the plot being leaked out. "I guess at least 10 persons may have been involved in bomb-making and carrying them to the trains. Investigations will uncover the full plot behind the dastardly crime committed on the innocent people of Mumbai," he said.

He also did not give much credence to the Lashkar-e-Tayiba's statement that it had no hand in the incident. "Of course they have denied it, but how much can you trust them? After all they are known for carrying out such attacks without blinking an eyelid," Gill said.

Though he did not rule out the involvement of local elements who may have acted as carriers etc, hardcore terrorists could also do the same work with ease without getting detected, he pointed out.