Police in Tampere have filed attempted murder charges against a 16-year-old and a 17-year-old for a knife attack in the forested outdoor area of Kauppi last September.
Police say the suspects planned the attack in advance but the victim was chosen at random.
Investigating officers also believe that one of the suspects uploaded a video to the popular social media app Snapchat shortly after the attack.
The footage shows a person walking along a forest path with a knife in their hand. Someone, apparently the person filming, can be heard saying that they had just tried to rob "about five people".
"Then I stabbed someone four or five times and oh well, attempted murder and attempted robbery, going to jail for this," the male voice can be heard saying. "You guys can come say hello to me there."
The suspects had been sent for psychological evaluation, and the results will be considered by the court when proceedings begin on 26 April.
The suspected attempted murder, and the sharing of the video on social media, have generated a lot of discussion in Finland about violence committed by young people.