
"No one acted upon our information," Damodar Tandel said.
A huge consignment of explosives and guns brought ashore in Mumbai in 1993 was used to set off a string of bombs in the city that killed 257 people.
Mumbai residents returned to schools and offices on Monday for the first time since the attacks.
Candlelight vigils were held in New Delhi and at various spots in Mumbai on Sunday, with people holding hands, singing and carrying banners, some in remembrance of victims, others protesting over what they saw as government inaction.
Candles and flowers were also strewn at the bullet-scarred Cafe Leopold and at barricades in front of the Taj and Trident hotels, where the gunmen holed up during the 60-hour siege.