In Soest, a man shot a gun from a residential building.
The police immediately cordoned off the area, according to the information that there were "strong forces" on site.
A special task force broke into the apartment on Friday evening, and the 37-year-old was arrested without resistance, the police said.
A witness had previously reported several shots.
Soest - The man is said to have shot several times from an open window on the first floor of the apartment building.
The police took the suspected shooter to the station, where he was to be questioned.
It was initially unclear what kind of firearm it was.
dpa