Detectives in Co Antrim are investigating the report of an arson incident at a flat in the Crebilly Road area of Ballymena on Saturday evening.
Police received a report of the fire at around 7.05pm, after a liquid had been poured on the door and set alight.
Firefighters attended the scene and extinguished the fire at the property, which was empty at the time.
It is understood detectives are still trying to establish a motive for the attack.
A police spokesperson said: “This is being treated as arson and anyone who may have seen anyone suspicious in the area or to anyone with CCTV or other footage that could assist with enquiries, is asked to contact detectives on 101 quoting reference CW 1314 of 31/08/24.”