State police are now investigating an ammonia leak in Corbin.
The Corbin Times Tribune is reporting that despite local officials determination that foul play was not involved in the spill, state police are taking up the case.
The leak at the Corbin Ice Plant led to an evacuation of nearly a thousand people in a mile-and-a-half radius around the plant.
A few residents were treated for eye and nose irritation, but no one was seriously injured.
The leak killed hundreds of fish in a nearby creek, but officials say the threat is now over.