Four parked cars were destroyed in a fierce fire in Fgura late on Sunday.
The blaze, at Triq Vincenzo Maculano, was reported at about 11.45pm.
Slight damage was also caused to a nearby residence.
The vehicles were a BMW520D, a Peugeot 307, a Toyota Vitz and a Nissan March.
No one was injured.
The police are investigating.