MINNEAPOLIS (AP) — Officials at the University of Minnesota have lifted a warning for students to take shelter after man with a gun tried to rob a student on campus.

University police say the armed man tried to rob a student of her laptop in Anderson Hall on the West Bank of the Minneapolis campus Monday before fleeing into the tunnel system between buildings.

The Star Tribune reports police say the gun was not fired.

After the attempted robbery, the university sent a text alert at 3:20 p.m. Monday warning students on the West Bank to stay in a safe place. The alert was lifted about an hour later.

A university Tweet says police believe the suspect has left campus. All regular classes and activities will continue as planned.