A gunman on Saturday attacked a shisha bar in southwestern German city of Stuttgart, local media N-TV reported.
Police said there was no one in the building when the incident occurred. The perpetrator could have escaped and nobody was injured.
The attack came days after a fatal shooting attack in Germany's southwestern city of Hanau.
On Wednesday, a 43-year-old man killed nine people with immigrant background in two shisha bars in Hanau before killing his mother and himself.
