"All other offices will remain open as usual and the closure of the university is for the purpose of reading and examination only. The remaining examination will be conducted after 05/01/2020," the Registrar said in a statement.
He said the schedule for examination will be notified later.
Earlier, AMU Proctor Prof Afifullah Khan had said some security personnel were injured in brick-batting near the gate.
Police said the students broke down the police cordon.
Police have sealed all gates to the campus.
Tension prevailed in the area as police used batons and teargas to control the situation.