Inspector General of Police Pankaj Singh said the sketch was prepared on the basis of statement given by the owner of a cycle shop from where the suspected terrorists purchased cycles used to trigger the blasts with the help of explosives.

The sketch would be displayed at all important places, Home Minister Gulab Chand Kataria said.

He said several people might have been involved in planting the bombs and the number may be more or less than nine teams. Kataria said two shops were identified in the walled city where from the terrorists bought cycles used in the explosions.

A rickshaw puller identified as Vijay, injured in the blasts, was being questioned as he claimed that a lady had approached him for hire to carry a new cycle to an area near Hawa Mahal, one of the sites of the terror attack, about 45 minutes before the blasts.