Congress Vice President Rahul Gandhi, CPI - M General Secretary Sitaram Yechury and CPI Secretary D. Raja on Saturday visited the Jawaharlal Nehru University here (JNU) to join the protests against the police crackdown on students accused of sedition.
About 2000 people, including students and teachers, gathered in front of the administration block of the JNU campus to condemn the arrest of the university's students' union president Kanhaiya Kumar and action against other students.
Demanding the release of Kumar, Yechury said he will raise the issue in parliament.
He said Delhi police must leave the campus.
"In solidarity with the united struggle in JNU and elsewhere! The Resistance Shall only Grow Stronger!, " CPI - M said in a tweet.
Delhi Congress chief Ajay Maken and CPI - ML senior leader Kavita Krishnan also joined the protest against the police crackdown.
The JNU student union has declared a "strike" in the university from Monday.
Countering the protests, Akhil Bharatiya Vidyarthi Parishad (ABVP) also staged a demonstration against students who allegedly had raised anti - India slogans in an event on February 9.
The ABVP members showed black flags to Rahul Gandhi and shouted slogans including "Rahul Gandhi go back".