Roy went to address the meeting, along with senior lawyer Prashant Bhushan and DUTA President Nandita Narain among others.
The meeting on "Police repression on teachers and students" was held to condemn the increased police presence in the campus and to censure the raid on DU teacher G N Saibaba's house for his alleged Maoist links and against the police action against students who were on hunger strike demanding accommodation for pass-out students of the University.
Police whisked the protesters away as they tried to storm the meeting.
Addressing the meeting, Bhushan criticised the government's action against activists working for the people.
"The human right's activists are raising their voice against the violations of the rights of tribals, like Saibaba and a new trend of arresting these activists has started. Charges like Naxal literature's recovery are slapped on them," he said.