Mystery Plane Over Indiana

From the Hoosier Times:

It is a plain, white, small plane, a single-engine prop, that has been appearing over Bloomington around midnight, circling the city a few times at relatively low altitude and then flying off. It repeats the route in the early morning and around noon.

Officials are being very close-mouthed about what is going on, despite increasing concern from city residents, several of whom have called The Herald-Times about the mysterious plane and its repeated flights.