The president of Jawaharlal Nehru University's students union was on Friday arrested in a case of sedition and criminal conspiracy, police said.
Kanhaiya Kumar was arrested for raising anti - India slogans at an event organised by the students to commemorate the hanging of Parliament attack convict Afzal Guru, who was hanged in Tihar Jail in 2014.
He was arrested by the Vasant Kunj north police in south Delhi.
Earlier on Thursday, police took suo - moto cognizance and registered an FIR against unknown students.
The university witnessed violent clashes between two students groups on Tuesday night over an event after which police were deployed to maintain law and order.
The students from a Left wing organisation were to hold an event marking the death anniversary of Guru in which anti - India slogans were raised.
Another commemorative meeting was held at the Press Club of India in Delhi on Wednesday where anti - India slogans and placards were raised.