MINNEAPOLIS, MINNESOTA, U.S. – A two-alarm fire caused some damage before it was contained March 20 at the main Grain Exchange building in downtown Minneapolis, the Minneapolis Star-Tribune reported. No one was injured.

The blaze originated on the first floor of 400 S. 4th St., one of three Grain Exchange buildings, about 6:30 p.m., the Fire Department told the Star-Tribune. Flames were quickly knocked down, but smoke was thick inside the building afterward.

The 138-year-old building was evacuated as firefighters searched several floors. They broke windows to ventilate the structure and used water to wash down the area, according to the Star-Tribune. Police cordoned off the entire block, and many emergency vehicles came to the scene.

The cause of the fire is under investigation. It remains unclear how long the historic building will remain closed.