Early Tuesday evening, Amundson Hall was evacuated due to a hazmat incident, according to a SAFE-U alert.

The initial alert was sent just after 6 p.m. and stated the Minneapolis Fire Department (MFD) was on the scene and police had set up a perimeter. As of about 6:15 p.m., firefighters reported the entire building was evacuated.

“University staff at Amundson Hall believed they heard the sound of gas being released in the building and took a cautious approach by pulling the fire alarm,” University of Minnesota Public Relations Director Jake Ricker said in an email statement Tuesday evening. “The building is again occupied and in use.”

Officials are still investigating the nature of the chemicals. According to a third SAFE-U alert sent around 6:50 p.m., the Department of Public Safety issued the all clear and campus was allowed to resume “normal business.”

Amundson Hall is located on the University of Minnesota’s East Bank campus along Washington Avenue. Amundson houses the University’s Department of Chemical Engineering and Materials Science.

Nearby buildings include Keller and Lind halls. Neighboring buildings are not affected by the evacuation, according to a second alert.

As of around 6:15 p.m., there were at last three MFD vehicles outside of the building’s entrance along with a group of about seven MFD personnel.

The last time University buildings were evacuated due to a material hazard was in August when there was a petroleum leak near the University’s sporting complexes. Residences along University Avenue were also evacuated in June after a fire and explosion.

This is a breaking news report and will be updated as more information is released.