He said he needed "some assurance" from the court that the trial will not be delayed.

He referred to delay in various terror cases.

To this, the court said the trial will conclude only when it commences and here that stage has not yet come.

During the hearing, the additional solicitor general, representing the Centre, said the plea is misconceived and the petitioner is not even aware that the Red Fort blast case is no longer with Delhi Police but has been transferred to the National Investigation Agency.

The blast took place in a car near Red fort on November 10 that claimed 15 lives.

The plea said an attack on the Red Fort is not an ordinary crime - it is an assault on the soul of India, on the republic's living symbol of sovereignty where the nation reaffirms its constitutional identity every Independence Day.

The targeted nature of this terror act is designed to destabilise national morale, induce widespread fear and weaken the authority of the republic, it said.

The petition said that the victims' families remain in complete darkness as they do not know why their loved ones were killed or which "forces" orchestrated the attack.

"Despite official assurances, only judicial supervision can guarantee that evidence is preserved, agencies cooperate, witnesses are protected, and the investigation aims not only at identifying the perpetrators but also at uncovering the purpose and intent behind the attack - information the victims are constitutionally entitled to," the plea said.