Arsonists struck again early yesterday morning when they set fire to the door of a residence in St Thomas Street, Fgura at around 3.45 am.
The police said that from preliminary investigations, it resulted that some unknown persons had set fire to the residence, causing damage to the front door.
No one was hurt in the incident and the fire was put out by the owner, the police added.
Duty Magistrate Dennis Montebello appointed several experts to assist him in his inquiry