Bus and Truck Crash with No Drivers

A strange incident involving two unmanned vehicles crashing has police baffled.

It all started when a parked school bus began to roll down a hill rear ending a parked truck and sending both speeding down the hill.

The truck came to a stop when it landed on its side but the bus continued on.

Hitting two utility poles on the way down and finally coming to a stop a few feet from a homes porch.