Two people died after a tourist bus and a passenger van collided in Lapland on Thursday afternoon.
Police announced at around 8 pm that two victims had died at the accident scene.
The chief physician of the wellbeing county of Lapland, Jyri J. Taskila, said a total of 37 people were involved in the accident, who were all brought to Lapland Central Hospital, at least to be checked out.
Taskila said that 31 people received care for minor bumps and scrapes.
On Friday, a Singaporean tour operator called Chan Brothers said that 29 of its customers had been on the bus.
The firm thanked the Finnish driver for taking evasive action, and said that the accident happened when the bus hit a van that had tried an overtaking manouevre while driving in the opposite direction.
According to the travel agency, the tourists were on a ten-night trip, including a trip to see the Northern Lights and a visit to the Lofoten Islands in Norway.
As of Friday afternoon, police had not confirmed that course of events.
On Friday morning, news service STT reported that two people involved in the accident remained in hospital.
According to fire department chief Tuomas Korhonen, the bus was chartered and carrying foreign tourists, while the driver was Finnish.
The collision appeared to be at least a partial head-on crash.
The two victims, preliminarily identified as passengers in the van, were among six people traveling in the vehicle at the time of the collision.
The tour guide had reminded the passengers to wear seatbelts, which likely reduced the severity of injuries for many.
Police are investigating the case as suspected aggravated endangering of traffic safety, negligent homicide and negligent injury. However, police did not disclose who was suspected of crimes.
The accident took place on the Pellontie road in Rovaniemi, around 25 km from the city centre.
Roads across Finland and Lapland were hazardous on Thursday, due to blowing snow and slippery conditions.
The accident prompted authorities to close the road and detour traffic, but rescue services announced just after 6pm the road had reopened.
The bus involved in the crash is owned by the tourist activities firm Lapland Safaris, the largest of its kind in the Nordics. The firm acquired the bus company Liikenne O. Neiemelä in October.
Police said they would provide more information about the crash no earlier than Friday afternoon.