The Andhra Pradesh police mayconsider seeking the United States' Federal Bureau ofInvestigation's help to analyse and harvest images ofsuspected bombers from a closed circuit television (CCTV)camera near the twin blast site here, sources said here today.
The footage obtained from the camera near the twinbomb blast site have not yielded any credible clues so far, asimages of three persons lurking near a bicycle, believed tobe strapped with explosives, is not clear enough, sourcessaid.
16 people were killed and 117 injured in the twin bombblast at Dilshuknagar here on Thursday.
"The footage was sent to a film laboratory in thecity. However, there has been no headway. The quality of thepicture could not be improved. So, the footage may be sent toFBI which has advanced technology," an official said.
The police have begun collecting call data transmittedbefore the twin blasts through cell phone towers located inthe vicinity of the Dilshuknagar.
Investigators are also of the view that the twin blastswere not triggered by a remote control but by a timer device,sources said.
"It is difficult to use remote control for triggeringthe second blast as the first explosion would disturb wavesand frequency. It would have made the second explosiondifficult. So, the bombs might have been triggered by atimer," they said.
Intensifying the probe, the police collected guestregisters of some hotels and lodges around the blast area andare verifying credentials of the occupants.
The police are yet to achieve a breakthrough even as 15teams comprising officials from Hyderabad and Cyberabad policeare investigating the blasts, besides the NationalInvestigation Agency (NIA).
Meanwhile, the special Maharashtra Control of Organised Crime Act (MCOCA) Court in Mumbai today allowed theMaharashtra Anti-Terrorism Squad (ATS) to interrogate twoaccused in connection with last week's Hyderabad twin blasts.
Firoze Sayyed and Irfan Landge are among the eightarrested by ATS in connection with blasts on Pune's JangliMaharaj Road last year.
"We had sought permission to interrogate Firoze andIrfan in connection with the Hyderabad blasts case and thecourt has granted us the permission," an ATS officer said.
In a related development, the Hyderabad City PoliceCommissioner in a statement today said all shopping complexes,cinema theatres and star hotels should be equipped with metaldetectors as well as CCTV cameras.
The Commissioner also ordered that no vehicle should beparked in front of any establishment and a cloak room has tobe provided to keep belongings.