"We have some vital clues, we know who has done. It is Lashkar mastermind Rehman, a Pakistani national who is hiding like a rat in the mountains of Shopian. He has masterminded this blast," said Farooq Ahmed, Inspector General of Police, Kashmir [ Images ] Range.

"We also know how they have carried it to Srinagar; from where it has come. It is a matter of time only that we get them," he added.

On Saturday evening, a police vehicle, carrying detenus, was blown off by an improvised explosive device . The explosion, the deadliest in recent months, shook buildings around Central Jail, the main prison in Srinagar.