MINNEAPOLIS  — A suspicious package that forced the evacuation of Morrill Hall at the University of Minnesota turned out to be a cell phone inside a box.

A postal worker discovered the package just before noon Thursday. WCCO-AM reports the evacuation notice was sent in a University of Minnesota emergency alert text message.

University spokeswoman Patty Mattern says an “all clear” text was sent about 30 minutes later. It ended up being a cell phone inside the package.

Part of Church Street on the university’s East Bank campus was temporarily closed.

Morrill Hall is home to the office of the university president and other administrators.