CB-CID teams are examining passengers in Guwahati

The next level of investigation into the May 1 twin blasts in the Bangalore-Guwahati Express at the Chennai Central railway station has opened up a huge logistical dimension in tracking the calls made by suspects from their mobile phones en route the 358-km journey from the ‘Garden City’ to Chennai Central.

The act of terror claimed the life of a woman passenger and injured 14 others.

The Tamil Nadu CB-CID’s massive task, as part of the multi-level investigation into the twin blasts, involves analysing hundreds of mobile phone records that emanated along the route, aided by signals from the mobile towers of various service providers alongside important stations.

According to police sources, special technical teams are looking for suspicious incoming/outgoing numbers along the Bangalore-Jolarpet-Katpadi-Arakkonam and Chennai Central stretch from the night of April 30 (before the train had left Karnataka’s capital) till the next morning when the blasts occurred.

The sources, however, did not elaborate on the massive exercise for obvious reasons. Even while perusing the CCTV footages recorded in the Katpadi, Jolarpet and Arakkonam stations, other CB-CID teams are examining passengers in Guwahati, who travelled on the train till its last stop.

Meanwhile, no further details of the man, caught on camera in the Bangalore railway station, seen covering his face could be obtained yet.

“We are not sure if he finally boarded the train as the CCTV coverage on platform No. 3 from where the train departed in Bangalore is not clear,” a CB-CID official told The Hindu on Sunday.

As regards the man who was seen rushing out of the train in Chennai Central, further verification of the CCTV footage showed him hurrying out of the station premises as well.

“He never came back to board the train…we have developed portraits of the person and making enquiries about his identity in Bangalore, Hyderabad, Patna, Chennai and Guwahati,” the official said.

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