LINCOLN, Neb. (AP) — Officials say a fire at the historic Terminal Building in downtown Lincoln did serious damage to offices of Legal Aid of Nebraska.

No one was inside the building when the fire was reported early Monday. One firefighter was treated and released at a hospital. No other injuries were reported.

Legal Aid of Nebraska executive director Milo Mumgaard says the organization’s eight-floor offices sustained considerable damage. The Nebraska Department of Insurance is moving temporarily to the State Office Building.

The fire cause is being investigated.

Lincoln Battalion Chief Leo Benes said there was heat and smoke damage on the ninth and 10th floors and water damage on the sixth and seventh floors.

The building was built in 1916 and is on the National Register of Historic Places.