
Soon after the explosion, Home Minister Shivraj Patil reviewed the situation with top officials of his Ministry.
Gupta, who talked to Delhi Police Commissioner Y S Dadwal, briefed Patil on the situation.
The nature of the explosives used in Saturday's blast was not immediately known. Forensic experts of the NSG bomb data squad, who visited the spot, found the nails in the explosives were sharpened on both sides.
Immediately after the explosion, shopkeepers and shoppers rushed to help the injured people and took them to nearby hospitals.
"There was a huge sound. I came out of my shop and saw some people were injured and screaming for help," a shopkeeper said.
People in the area displayed their anger by alleging that police came late despite being called several times.
"Police were nowhere to be seen till one hour after the incident. We took the injured to the hospital," a shopkeeper, who was injured in the incident, said.
Police have cordoned off the area and senior police officials have rushed to the spot to take stock of the situation.