The National Investigating Agency will question one person arrested by the Bihar police on the suspicion that he could have had a role to play in the Bengaluru Church Street blasts. The person who hails from Jehanabad was picked up after the NIA alerted the state police. NIA sources tell media that this person is a suspect, but only once a thorough investigation of the person is done will they come to any conclusion. The NIA feels that a module based in Bihar could have carried out the blast in Church Street also. We are checking all possibilities and want to be doubly sure, the officer said. It may be recalled that the Patna, Bodhgaya and Chennai train blasts had a link to Bihar. The NIA says that they are studying the similarities of these attacks. So far there is nothing concrete on hand, but such investigations take time the officer also pointed out.