NINE firefighters tackled a blaze sparked by an electrical fault in a TV and a VHS player.
Crews tackled the ground-floor flat fire in Camden Street, Gosport using four breathing apparatus and a hose reel.
Three residents were treated for smoke inhalation.
It happened at 4.45pm on Sunday and around 20 per cent of the flat was damaged.
Crews used a fan to clear the smoke in the flat and left by 6.11pm on Sunday.
Police say the cause is under investigation.