Firefighters were called to a blaze in a top floor flat in Onehouse this afternoon.
Crews from Needham Market and Stowmarket were sent to the incident at the third floor flat, in Union Road, at about 1.30pm.
Extra crews from Bury St Edmunds, Ipswich, Ixworth and Debenham were called as the flames spread to a second floor flat.
The fire was extinguished by about 3pm with all persons accounted for.
Paramedics treated one person suffering from the effects of breathing in smoke.