The University of Winnipeg has shut down its campus Wednesday evening — postponing some exams as a result — to investigate a possible security threat.

The campus was closed at 4:30 p.m. and is expected to reopen at Thursday morning, officials stated on the university's website.

The overnight shutdown came after the Winnipeg Technical College received what the U of W called a "non-specific security threat" earlier in the day that made references to the university.

A preliminary search of the campus did not turn up anything suspicious, according to the university, which added that the overnight closure is a precautionary measure to allow staff to conduct a more thorough search.

The campus closure means classes scheduled for Wednesday evening have been cancelled, while exams that were supposed to start at 6 p.m. will be rescheduled for Thursday.

The security threat also named Red River College, but officials there say no classes or exams will be cancelled at this time.

In a security bulletin posted online, Red River College said a bomb threat came in the form of a telephone recording that was called into the technical college at around 1 p.m.

The technical college's Erin Street campus was evacuated for part of Wednesday afternoon as police and security officers searched the premises.