It was at 19:30 that a man in his 35s was attacked near a grocery store in Lagersberg.
According to the police, he must have been attacked with a sharp object.
The man was taken to hospital and the injury situation was described as life-threatening.
On Sunday morning, the police had no information about the man's condition.
During the night towards Sunday, the police arrested a man in his 30s on suspicion of the crime.
The incident is being investigated as an attempted murder.