Fire crews from Morecambe were called to a fire in a block of flats which is thought to have been started deliberately.
Crews attended the building in Clarendon Road West, Morecambe, just after 5am this morning, Thursday.
The blaze had started in a communal stairway. One casualty was given precautionary checks by paramedics for the effects of breathing smoke.
Police have been notified of the incident.