Large craft, roughly the size of an SUV. No wings or propellers.

While making deliveries on River Road, I saw what I thought was a drone in the sky. It was large, roughly the size of an SUV, and hovering between 70 to 120 feet in the sky over a department store. I pulled over to watch it, but didn't think to take pictures because it had red flashing indicator lights on it, which I took to mean it was following FAA regulations.
It began to suddenly drift toward the east hill, moving at maybe 30mph. I began driving again but couldn't find it on the other side. It didn't make any sound, and the more I thought of it in retrospect, it bothered me how big it was. I've never seen a drone that large, and though it was dark, I made out no wings or hoops that might have held propellers.
It was shaped like an oval, but it had sharp edges along the front and back, almost like a car. In addition to the red light that seemed to flash every few seconds, there was a white indicator light as well, but I don't recall the frequency with which it flashed.
I called the police station later that morning and they didn't cite any other reports. I know it wasn't a plane or a helicopter. And I'm yet to see a drone that's more than 15 feet long.