Chennai/Bangalore, May 03 (ANI): Police released the video footage of a suspect in the twin bomb blast on the Bangalore-Guwahati train in Chennai that killed a woman and left many injured. Explosive devices concealed under seats went off in two coaches shortly after the train stopped at Chennai central station at about 7:00 AM. Inspector General of Crime Investigation Department of India, Mahesh Kumar Agarwal, addressed a news conference and said there were similarities between the twin blasts in Chennai and the serial blasts in Patna city which targeted Modi's rally. Agarwal also released a video footage captured by the CCTV which shows a bald man running in haste whose movement was suspicious.