Authorities are looking for the cause of an overnight fire in Waukon that destroyed a local business.

Fire crews from Waukon and Decorah were called out just after 9:30pm Tuesday to Mulligan's Grill Pub, on Rossville Road in Waukon.

Firefighters were on the scene for several hours, but could not save the business.

No one was injured.

The Iowa State Fire Marshall is investigating.