"It's quite clear that a very well-trained person has committed this attack," he said. "One has to proceed on the basis that it was a terrorist attack."
The attack was carried out in one of New Delhi's most secure districts -- only a few blocks from the residence of the prime minister himself.
"It appears that a motorcycle rider, a single person, came from behind and the person attached a device to the trunk's door of the Innova," he explained. "The explosion, according to the eyewitness...happened within seconds. And, we think it happened within about four to five seconds of the device being attached."