A van was “completely burned out” after being torched in a Fleetwood street, police say.
Detectives are investigating the blaze on Mount Road, which was discovered in the early hours of Tuesday.
Det Sgt Rik Irving, of Blackpool CID, said: “At around 1.30am, police discovered a fire on the road.
“A white Transit van was well ablaze and completely burned out. The fire is being treated as suspicious.”
Nobody has been arrested in connection with the incident and police are appealing for witnesses.
Anyone with information should call Blackpool CID on 101.