Firefighters responded to a blaze at the building that houses the Reagan Office Building at 4200 N. Clark St. on Saturday.

The blaze is believed to have been started by a fire extinguisher, according to a fire official.

The Reagan building, which is home to the National Association of Realtors, is undergoing renovations.

A statement from the building said: “We have been notified that a fire has been reported at the Reagan Building in Chicago.

The fire is contained and crews are currently investigating the cause of the fire.

As soon as possible we will be updating the public on the situation and any additional information.”