2006 Mumbai train blasts: I interacted with commuters to get clues, but they were scared to talk, says Dinesh Agarwal

Dinesh Agarwal, who was an inspector with the state Anti-Terrorism Squad (ATS) in 2006, said the 7/11 case was one of the toughest investigation-wise.

"Around 137 policemen and 40 officers were put on blast probe. We had no clue what to start with. I decided to travel in trains and gather information from commuters. A few days after the blasts, I travelled from Churchgate on the time the blasts had occurred and interacted with commuters, hoping to get some leads, but people were too frightened to open up," Agarwal said.

He added that the technical team of the ATS managed to intercept a few suspicious calls coming to the convicts from the Bihar-Nepal border that led to solving the case. "After four months, we filed the first charge sheet in the case," he said.

"We also came across a case wherein in order to get compensation money, relative of a man who had died in a railway accident had made a false claim that he had died in the blast. However, the probe revealed his lie and he was arrested."