Three assailants who had been laying in wait, shot Bablu Dube dead on the stairs of the court building when he was coming down after trial in a case, Superintendent of Police Vinay Kumar said.
Dube -- accused in over 36 cases of murder, extortion and kidnapping for ransom -- died on the spot while the assailants fled on motorcycles, he said.
The gangster was brought to the court of first-class judicial magistrate Kumud Ranjan for trial in an extortion case.