Eleven of the 12 people dead in the Delhi High Court blast have been identified.
According to reports, the victim succumbed to his injuries at the Ram Manohar Lohia hospital's emergency ward early Thursday.
"All we can say is one more victim has died, taking the death toll to 12," a Delhi Police officer said but hospital authorities refused to confirm the details of the deceased.
"Four injured are in a critical condition in the hospital's Intensive Care Unit," an official from the hospital said on condition of anonymity.
The explosion has left more than 75 injured.
The powerful bomb was concealed in a briefcase at the crowded Gate 5 of the High Court on Wednesday morning.