HOLYOKE, Mass. (AP) — Holyoke police are investigating a car crash mystery.

Police responding to reports of a crash found the heavily-damaged car flipped on its roof at about 2:30 a.m. Thursday.

But there was no one inside.

Police say three people were seen walking away from the vehicle. A search of the area by police and firefighters came up empty too.

The car had not been reported stolen.

Investigators are asking anyone with information about the crash to contact them.