Provincial police believe an arsonist is responsible for a fire in Orillia on Thursday morning.

Emergency crews were called to John Street, at around 5 a.m. after a Ford pickup truck was found engulfed in flames

Investigators say the fire was so intense that it started melting the siding of a nearby home.

No one was injured in the incident and the OPP crime unit is now investigating.

Police are trying to find out who started the fire and are asking anyone with information to contact them.