Firefighters were called to reports of smoke coming from a property in Hastings this morning (Thursday).
Crews attended the address just before 11.25am in Quarry Crescent and found that the flat was on fire.
Crews used breathing apparatus, a hose reel and firefighting foam to tackle the fire.
There were no reports of injuries.
An initial investigation has been carried out and the fire is thought to have been accidental.