Vikram Singh Chauhan, the face of two attacks on journalists and JNU students and teachers at a court complex here last week, was arrested on Wednesday.
He was later released on bail, the police said.
Mr. Chauhan was caught on camera leading a group of lawyers in mounting the assaults on two occasions — Feb. 15 and 17 — at the Patiala House courts complex. The lawyer appeared before the police, six days after he was served summons for the violence in the court complex.