A suspect in the Hyderabad blasts is understood to have revealed during the narco-analysis test that the persons involved in "planning and executing" the terror strikes were still in the city.

Syed Imran Khan, an executive in a private bank who underwent the narco test in Bangalore on Tuesday, told the investigators that he had stored a consignment of 10 kg of RDX in his house before passing it on to other contacts in the city, police sources said.

Imran, who is among the 15 persons against whom Andhra Pradesh police booked criminal conspiracy case, is believed to have told the police that three more persons, all foreign nationals, involved in planning the terror strikes were still in the city.

He, however, denied having planted the bombs in the city, sources said.

Imran and another suspect Kaleem were taken to Bangalore on Monday for narco tests. Both were arrested in connection with the May 18 blasts at Mecca Masjid and the smuggling of RDX from Bangladesh into the city in February 2007.

The police in Hyderabad believe that both the Mecca Masjid blasts and the August 25 twin blasts at Lumbini Park and Gokul Chat Bhandar were the handiwork of Bangladesh-based terrorist organisation Harkat-ul-Jihadi Islami.

The narco analysis tests are expected to help police in getting information about Bilal, believed to be the mastermind behind the blasts.