Thunder Bay police are investigating a suspected arson that took place on East Francis st. Police and firefighters were called to the scene late Friday night, where a vehicle and a motorcycle were lit on fire. It's reported that the vehicle was a 2001 Jaguar and the motorcycle was a 2001 Kawasaki. Police also found a 5 gallon gas can, along with a home made explosive device. Both the vehicle and motorcycle were destroyed by fire.