A man was stabbed to death at a road in Janakkala, Kanta-Häme on Wednesday.
The police received a call which established that a man had been stabbed inside a moving vehicle along the national road 3 at around 7pm.
When the police arrived, the victim was on the side of the road and the traffic had become congested.
The victim was given first aid at the scene but later succumbed to the injuries at a hospital.
The police arrested one person on suspicion of the crime.
The police are investigating the incident as murder.