The video footage released at an hurriedly called press conference by CB-CID IGP Mahesh Kumar Agarwal said "the movement of a person found in some clippings is unusual and need verification".
The image of the suspect, a bald headed middle aged man was clearly visible in the footage who got down from S3 coach, next to the S4 and S5 which bore the brunt of the blast.
"He was seen running from the train moments after it chugged into the platform No 9. The movement of a person found in some clippings is unusual and need verification", Agarwal said justifying the police suspecting him.
Agarwal asserted that investigations have to led the police to believe that the timer devise fitted explosives were not planted at Chennai and the metropolis was not the target of the perpetrators of the crime.
Had the train maintained its schedule, it would have reached Andhra Pradesh by 7 AM, he said while noting the 90 minute delay in the arrival time.