The unions on strike are the Non Academic Staff Union, Senior Staff Association of Nigerian Universities and National Association of Academic Technologists.
The decision to shut down the school was taken by the Senate of the University at its emergency meeting held on Tuesday.
The Senate approved that the students of the University should proceed on an “End of the Year” break with immediate effect.
A statement by the Public Relations Officer of the University, Abiodun Olarewaju, said the students have been asked to vacate their halls of residence latest by 4pm on Wednesday (today).
The school is to resume on January 2, 2018, while lectures commence the following day.
The statement added: “Accordingly, the general public, particularly the Parents/Guardians of our students have been asked to note this latest development and ensure that their children and wards are prevailed upon to comply with this directive.