The National Investigation Agency(NIA), which has been formally entrusted with the probe into the Sunday attack, is now sifting through the data of telephone calls, incoming as well outgoing, from the temple town.
Some clues had been found during the exercise and a few persons might be called for questioning soon, police said in Patna today.
Official sources, meanwhile, said today the IP address of the tweet handle @IndianMujahidin in which it was purportedly claimed that the banned terror outfit Indian Mujahideen(IM) orchestrated the blasts was traced to Pakistan.
Police said that Binod Mistri and Dashrath Yadav, who hailed from Gaya district, were released by the NIA last night for want of evidence after recording their statements, police said.
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With the release of the two men, all the six people detained after the blasts have been set free.
Mistri was detained on Sunday evening by security personnel several hours after the blast on the basis of his voter identity card found inside the temple during search operations after the explosions.
Dasrath was held for questioning yesterday on the basis of details of calls made from Mistri's mobile to him. Both hail from Barachatti village in Gaya district.
Official sources said in Delhi that investigators are looking into the genuineness of the Twitter handle purportedly of IM but they are suspicious as it became active barely a day before the blasts.
The sources said after investigators approached Twitter seeking the location where the messages were uploaded on it, the US-based company suspended the account.
The sources said they want to be sure about the location from where the messages were being posted as Pakistan's location could have been result of a proxy IP address.