Three boys, aged 16, 17 and 18, were arrested late on Thursday for their alleged roles in the fatal stabbing of a 17-year-old, North Zealand Police said in a press release.
According to police, the 17-year-old victim was stabbed in a tunnel close to Hillerød Handelsskole, a business school for students who have finished their primary education.
The stabbing occurred shortly after 1pm. When police responded to a distress call, the victim was rushed to Copenhagen's Rigshospitalet but doctors were unable to save his life.
According to Ekstra Bladet, the fatal incident occurred during a lunch break from classes at a spot where students often go to smoke. Witnesses told the tabloid that the stabbing could be connected to a fight that flared up at a party last weekend.
The three arrested teens are due to make a preliminary court appearance on Friday.
North Zealand Police said it would not be releasing additional information on the fatal stabbing at this point.