Abdul Karim Tunda, alleged Lashkar-e-Toiba bomb expert, assaulted by a man in Patiala House Court complex on Tuesday.
An alleged activist of Hindu Sena hit Tunda on the back while he was being taken inside the Court building, according to reports.
Following the incident, the Court ordered in-camera proceedings in Abdul Karim Tunda's case.
Meanwhile, the Court remands Tunda in four days police custody.