State officials are investigating a series of mysterious explosions in southern Hopkins County — blasts that residents say is damaging homes in the area.

Residents living just south of Nortonville blame a lead company, Donovan Commercial Industries, for an operation involving activities stretching from making plastic explosives to the disposal of old military ordnance.

Shane Cavanaugh, who lives near the plant, told The Messenger he's noticed dishes shaking and picture frames falling from his walls.

Company spokesman Matthew Donovan, who did not return messages left on his office phone or cellphone voice mail.

Kentucky Explosives and Blasting Branch manager Raymond Hudson said an inspector is setting up seismographic equipment in the region. Once the source is identified, the state will determine whether the blasts comply with state regulations.