A statewide search is underway to find a stolen device that contains radioactive material.
Authorities said it was stolen from the parking lot of an Oklahoma City hotel. The gauge was inside a trailer stolen from a hotel parking lot off I-40.
The DEQ said the gauge is used to measure the moisture content and density of construction materials.
It is not considered a health risk to people unless it's opened and authorities said it would be difficult to open for a person unfamiliar with it.
The gauge was in a trailer that was also stolen. The trailed is owned by a Missouri-based company called Midwest Testing. It has Kentucky license plate 624-274
A spokesperson for the Department of Environmental Quality said the amount of radiation in the gauge likely would not deliver a lethal dose, but would be a health risk.