Dortmund (dpa / lnw) – An unknown woman slapped an eight-year-old on a playground in Dortmund because the children were too loud when playing. The stranger came to the children and complained about the noise, the police said on Thursday. An eight-year-old from the group then plucked up his courage and replied that they were in a playground after all. The unknown woman then slapped him so hard that the boy got a nosebleed. His mother filed a complaint. The police are hoping for information from witnesses after the incident, which happened on Sunday.