Penn State’s Wilkes-Barre campus is closed until Saturday morning due to a bomb threat.

According to a PSUAlert sent to those registered for the campus at 2:25 p.m., authorities are responding and have advised everyone to avoid campus. All classes and activities are canceled through the end of the week.

The first alert came at 2:00 p.m. and said the “Science Center is temporarily closed due to an emergency.” According to the Wilkes-Barre website, a threatening message was discovered on a bathroom door in the campus’ Science Center.

“In recent years, the threat of explosive devices has increased at an alarming rate,” the Wilkes Barre Safety and Security website states. “NEVER disregard any call related to a bomb scare!”

The message on the bathroom stall warned that a bomb was in the building, and it would detonate some time before noon on Friday, March 4.

Pennsylvania State Police are on campus with bomb-sniffing dogs sweeping all the campus buildings. Updates on the situation will be posted online.