East Sussex Fire and Rescue Service were called to a flat fire at a property in Upperton Road, in Eastbourne, today at 00.23.
Seven appliances and an aerial ladder platform are currently at the scene and two main jets are being used to tackle the fire on the second floor of the building.
Locals are advised to close all doors and windows and to avoid the area to allow emergency services to deal with the situation.
UPDATE: 2.20am
Please avoid the area as the incident was escalated to eight appliances. The fire is now extinguished and under control. Emergency services will remain at the scene but appliances are expected to be scaled back.
UPDATE: 8.37am
All appliances have left the scene. The stop message came in at 07:12 this morning. A fire investigation will be carried out.