A building on the University of Minnesota campus that was evacuated Tuesday evening due to a “hazmat incident” has since been cleared by public safety officials.

At 6:49 p.m., the campus community was informed they could return to the building, according to a SAFE-U EMERGENCY alert.

Amundson Hall, located at 421 Washington Ave. SE on the University of Minnesota’s Twin Cities campus was evacuated following a “hazmat incident,” according to a previously issued safety alert.

University staff in the building thought they heard the sound of gas being released in the building and pulled the fire alarm.

The Minneapolis Fire Department, the University of Minnesota Police Department, and the University’s Environmental Health and Safety team arrived on the scene, and police set up a perimeter. The public was told to stay outside of the perimeter, the alert said.

Neighboring facilities were not affected by the incident, authorities said.