All six suspected Lashkar-e-Taiba members, arrested in connection with the Mumbai local train blasts, are likely to be subjected to scientific tests, including narco-analysis, police said.
"We may subject the suspects to scientific tests to ascertain their involvement in the serial blasts," Mumbai Police Commissioner AN Roy said.
Roy said that investigators were confident that those arrested were part of two separate LeT modules and wanted to know whether the six were involved in the serial blasts or if they know of any other module that may have been involved.
With a limited time for police custody at their disposal, the Anti-Terrorism Squad wanted to interrogate the suspects as quickly as possible and get details on the planning and execution of the blasts, police sources said.
While scientific methods of investigation like lie-detector and brainmapping tests can be used as evidence, other tests like narco-analysis help collect valuable information, the sources said.
In case the police decide to conduct the tests, it will have to move the local court and seek its permission.
Since not many forensic laboratories have testing facilities, the ATS will also have to take prior appointment at forensic science laboratories that perform the tests, the sources said.