Two cars caught fire and another three were damaged when a parked BMW went up in flames in Birkirkara early on Wednesday.
The police said the parked car caught fire at 4.10am in Triq il-Girasol, on the corner with Triq F. Sommier. The fire then spread to a nearby Kia.
Another three parked cars, a Peugeot, a Fiat and a Toyota, were damaged by the resulting heat.
Firefighters were called on site and controlled the fire. No one was injured.
An inquiry is being held.