Doctor declared all the four convicts in the Nirbhaya case dead after they were hanged at Tihar Jail, an official said.
The four convicts --- Mukesh Singh (32), Pawan Gupta (25), Vinay Sharma (26) and Akshay Kumar Singh (31) --- were hanged at 5.30 am.
According to the official, their bodies remained suspended in the air for nearly half-an-hour.
"Doctor has examined and declared all four dead," Director General of Tihar Jail Sandeep Goel said.