A traffic accident between two cars occurred on Saturday evening on national highway 40 between Eksjö and Nässjö.
According to the emergency services, the accident is considered “very serious”.
A woman died in connection with the accident, and three more people are being treated in hospital with serious injuries.
The police have started a preliminary investigation into negligence in traffic after the accident.
The alarm about the accident came at 19.30 on Saturday.