UPDATE: Classes were canceled at UW-Platteville after a student reported hearing and seeing a gun in a men's bathroom, according to Channel 3000. 

The student was in a first-floor men's bathroom in Ullsvik Hall around 12:50 p.m. when he reported hearing the racking of a gun and seeing a gun barrel, UW-Platteville Chancellor Dennis Shields said during a news conference.

Shields said the student left the bathroom and pulled the fire alarm, which is when Ullsvik Hall was cleared.

All offices and services were closed, including the Markee Pioneer Student Center, for the rest of Monday. Shields said they do not have any plans to close the school Tuesday.

Shields said no shots were fired, and no injuries were reported.

Officials said the student described the person who reportedly had the gun as a white man who was wearing a gray shirt, black pants and black shoes.

ORIGINAL: The University of Wisconsin-Platteville canceled classes on Monday as of 1:30 pm due to a security threat, according to the university's website.

All offices and services are closed, including the Markee Pioneer Student Center.

Employees and students should leave campus unless you are essential personnel. Students who live in residence halls should return to your hall.

Food service will continue in Bridgeway Commons.