Ashutosh Kumar, a student facing sedition charges for allegedly raising "anti - India" slogans on the Jawaharlal Nehru University (JNU) campus, joined the police investigation on Saturday.
The police on Friday night asked Ashutosh to join the investigation at R. K. Puram police station here.
"Ashutosh, Rama Naga and Anant Prakash Narayan communicated to the police a few days ago their intention to join the enquiry, gave their contact number and told the police to call them whenever needed, " said Sucheta De, national president of All India Students' Association (AISA), an organisation active in JNU.
She said the police called Ashutosh on Friday night to come to the police station on Saturday morning. "So he has gone today. We were never resisting. "
The police has already been interrogating JNU Students' Union president Kanhaiya Kumar as well as two other students of the university Umar Khalid and Anirban Bhattacharya.
Kanhaiya Kumar, who is currently in judicial custody, was arrested on February 12. Both Khalid and Bhattacharya surrendered before the police on Tuesday night.
All students, including Ashutosh, Rama Naga and Anant, are facing the charges of raising "anti - national" slogans in an event organised on the JNU campus on February 9 to commemorate the execution of parliament attack convict Afzal Guru.