Police said Wednesday the theft was discovered Tuesday at a now-closed Dillons store in the southern part of the city.
Capt. Doug Nolte says damages to the building will likely cost more than the copper. He says the thieves cut holes throughout the building. Nolte says they appeared to be working inside it for a long period of time.
Nolte says police are working with evidence found at the scene to track down the thieves.