The alarm about the incident came at 7:15 p.m. on Friday.
One teenager was taken away by ambulance. In addition, parents who arrived at the scene took a number of young people to the hospital. In total, six people needed medical attention.
The person who was taken by ambulance is in his 15s, says police spokesperson Nadya Norton.
The others are also in their 15s, the police announced later in the evening.
The police have opened a preliminary investigation into causing bodily harm, illegal sale and illegal possession of alcohol.
Two weeks ago, twelve young people in the Stockholm area received treatment after drinking smuggled alcohol. Police suspect that they drank "spiked alcohol" that they got from a so-called "vodka truck."
Nadya Norton says it's too early to say whether Friday night's incident has anything to do with the previous events.
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