The perpetrator has acted deliberately and in a particularly brutal and cruel manner, the police write in a press release on Tuesday.
The motive is said to have been that the relationship had ended.
29-year-old Janne Puhakka, a well-known ice hockey and TV profile in Finland, was found dead in his apartment in Espoo on Sunday evening after a worried friend called the police. Puhakka's partner, reportedly a 60-year-old Norwegian man, was arrested at the scene with a hunting rifle and is now in custody. According to the police, he had a weapons license issued in Norway.
One party has shot the victim with a shotgun and the victim has died, says Criminal Commissioner Matti Högman to Svenska Yle.
Janne Puhakka made headlines in the hockey world when he came out as gay in 2019. At the time of his death, he was a participant in the Finnish version of the TV program "The Traitors". The final episode, which was scheduled to be broadcast on Thursday, will not be shown due to the death.