Firefighters were tackling a blaze at a block of flats in The Drive, in Hove, this evening (Tuesday 21 February).
One person was treated by paramedics at the scene.
East Sussex Fire and Rescue Service sent at least four fire engines to the scene near the Eaton Road traffic lights.
People in the area rang 999 after what sounded like an explosion and fire engines from Preston Circus and Roedean, in Brighton, joined crews from Hove and Lewes.
The source of the fire was in the basement of the block in the electrical intake and it was understood to have started by accident.
The fire service said: “We were called to reports of a domestic dwelling fire on, The Drive, Hove at 7.44pm.
“Seven pumps were called, supported by one aerial ladder platform and five officers from West Sussex and East Sussex Fire and Rescue Service.
“One casualty has been reported and left in the care of the ambulance service.”
UK Power Networks were called out to make the electricity supply safe.
