A woman is seriously burned, she is sedated, says the police's press spokesperson Thomas Fuxborg.
The woman was retrieved with a ladder from a balcony. The other two injured are men, one of whom was carried out on a stretcher by the firefighters and has unknown injuries.
The alarm came at 18.45 on Saturday.
When the rescue service arrives, the fire is burning strongly in the hall, then it spreads to the entire apartment. The apartment is completely burned out, says Fuxborg.
The fire is limited to one residence, but there has been a lot of smoke in the building. The police have initiated a preliminary investigation into arson.
The technical investigation will show what happened and how the fire started.