In a park on Réaumurstraße (near the Lichterfelde-Süd S-Bahn station), two groups of young men got into an argument on Sunday night. An 18-year-old was stabbed and died.
The situation escalated around 1 a.m., with a critically injured 18-year-old lying on the ground.
The police said the young man was resuscitated on the spot and taken to a hospital, where he succumbed to his severe stab wounds.
Police arrested four suspects aged 19 and 21 near the train station.
The first murder commission took over the investigation.
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