AUGUSTA — The state of Maine is suing the owners of the Kennebec Arsenal, saying the historic compound in downtown Augusta has been allowed to deteriorate while it awaits planned renovations for commercial, retail and residential use.

The complaint by the Department of Administrative and Financial Services and Maine Historic Preservation Commission, which was announced Wednesday, names Main Street I, LLC and Niemann Capital LLC, the current owners of the arsenal property.

The case, filed in Kennebec County Superior Court, claims the defendants violated a covenant by neglecting the property, resulting in significant deterioration. It seeks damages for the cost of repairs and return of the property to the state if those conditions aren’t met.

An emailed message to Tom Niemann of Niemann Capital was not immediately returned Wednesday.