Three people were seriously injured in a knife fight on Friday night. They had to be taken to the hospital and operated on.
The argument developed late in the evening in an apartment on Simon-Bolivar-Strasse in Alt-Hohenschönhausen. Several men are said to have quarreled on the 2nd floor.
The police, alerted by neighbors, arrived at the address around 12:45 a.m. and found traces of blood that began in front of the house and extended to the apartment.

A total of three men, whose personal details are not yet fully established, with serious injuries, including stab wounds, were taken to hospitals and operated on immediately.
The criminal police took over the investigation at the crime scene that night.
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https://www.bz-berlin.de/berlin/lichtenberg/drei-verletzte-nach-messerstecherei-wohnung-blutspur