The Eastern University has been ordered to be evacuated as tensions remained high following the attack on security staff by Sinhala students on Tuesday.
The order was issused on Saturday by the Eravur Magistrate Court, the Daily Mirror reported.
Two security staff, including one female member of staff, were hospitalised following the attack.
Sinhalese students, who had been protested demanding accommodation and for academic suspensions to be revoked, blockaded the administration building and attacked the staff, claiming they had been ignored by the administration.
Security staff continued to receive threats, and temporarily took refuge at Eravur police station the night after the attack.