The students body alleged that the police lathi-charged the students who were protesting peacefully.
The students were taken to Tuglak Road Police Station and a woman constable dragged JNUSU vice president Simone Zoya Khan inside a room and beat her up, it alleged.
"A police constable locked the room from outside," the JNUSU said in a statement.
Efforts to reach Deputy Commissioner of Police (New Delhi District) for his reaction did not fructify.
"We were taken from the protest site to Tuglak Road Police Station. Within the station premises, I was dragged inside a room and was punched on the face and beaten up," Khan alleged.
"We will file a complaint against the constable," she told PTI.