Six large trucks were set on fire in Repentigny, about 30 minutes northeast of Montreal.
Authorities say six trucks were set on fire on Bourque Street around 1:15 a.m. The trucks were in a fenced-off area in the city's industrial park.
Police say the suspects first cut the fence to enter and then smashed the trucks' windows and used accelerant to propagate the fire.
They're asking for anyone with information to contact them.