Historic grain elevator catches fire in Superior

SUPERIOR, Wis. (CBS 58) -- An old grain elevator caught fire in Superior on Monday afternoon.

Three workers and the building's owner were working there at the time and are safe.

Officials say it could take days to put out the fire.

The Duluth Seaway Port Authority says the elevator, built in the 1800's, was being salvaged for wood.

A nearby home also caught fire.

The cause is under investigation.