The police are examining a possible connection between all these incidents.
Farid, owner of the hospitality business below the shot apartment, told RTL 5's 112Vandaag program that the gunfire shocked him.
"At first, I thought it might be near me or around here, but later I understood it was above the business.
That is definitely frightening," he said.
He expressed concern for his business, which has operated for about a year, saying, "We are trying to build something here, but this situation is not helping."
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Farid also emphasized that he has no involvement in the violence. "Most people know that, but it remains difficult," he added.