Low-flying airplane?

This just in (and we don't have much and what we do have is spotty).
The Washington County Sheriff's Department has been alerted by Homeland Security to be on the look out for a low-flying airplane that entered Washington County recently. However, the Sheriff's Department dispatcher said Homeland Security didn't give any further information on the type or color of plane or any other details. Evidently, they were just told to be on the look out.
Our scanner picked up at least one county department alerting their crew to be on the lookout, but no other information is available at this time. I will post updates if I hear any, but I'm doubting I'll hear much.
I know there is a very active yellow cropduster airplane operating out of the Washington County Veterans Memorial Airport and he has been working at locations throughout the county over the past couple weeks.
If you see or hear anything related to this, please call the News office or post a comment to this message.