Sources in the investigation agency, which rushed a team to Bangalore to pursue the new leads in connection with the blasts, have gathered information that the perpetrators of the explosion could have got support from sleeper modules working in Karnataka.
An official refusing to be named said here that information so far collated by the investigating team suggests that the bomb fitted with a timer devise could have been planted at Bangalore.

The CB-CID team has been interacting with neighbouring state police and viewing CCTV footages of Chennai Central Railway station, the scene of the blast, sources said.
"We are studying the footages to see if the accused actually travelled in the train,” the official said.     

The train, which left Bangalore at about 11: 35 pm on April 30, arrived here on Thursday at around 7: 10 am and was delayed by about an hour. Ten minutes after its arrival, two low-intensity bombs exploded in quick succession, killing a woman techie and injuring 14 others.
In another development, a six-member NSG team led by Lt. Col. Balakrishna arrived here late last night to assist the state police in the ongoing investigation into the explosions, sources said.
The NSG team held discussions with top police officials of the state on the incident, the sources said.


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