Three buildings at the University of Colorado Boulder were evacuated Friday morning after a report of a fire.

CU Boulder tweeted that the fire occurred on the third floor of the Porter Biosciences building – a facility that according to the university’s website has a two-story laboratory.

The Gold Biosciences and Muenzinger Psychology buildings were also evacuated.

CU says police, firefighters and emergency medical personnel are on the scene of the fire.

At this point, there are no reported injuries.

People are told to avoid the area and classes are canceled in these three buildings for the rest of the day. There are no other cancellations on campus.

There’s no word yet what led up to the fire or how much damage it caused.