The accident took place on provincial road 395 in Masugnsbyn in the municipality of Kiruna. Masugnsbyn is about ten kilometers east of Kiruna.
The alarm came just before 2 am, it is unclear how the accident went.
– It's a truck and a car – a minibus or a van – that crashed, said Björn Pettersson, officer at the police regional management center.
On Saturday afternoon, the police confirmed that all six people in the passenger car died as a result of the accident.
The dead are all foreign citizens and have not yet been identified.
The lorry driver must be physically unharmed but hardly alarmed, reports TT who has had contact with his employer.
The event is currently being categorized as the cause of someone else's death, but there is no suspect because the classification is not clear at the moment. The police write on their website that they can be changed afterwards.
By 7 am on Saturday morning the vehicles had been repaired and the road opened for traffic.