A teenager dressed as a "killer clown" and brandishing a hammer has been stabbed after attempting to scare a group of young people.
Police in Berlin said a 14-year-old in the group responded by pulling out a knife and stabbing the clown, only to find that the person behind the mask was a 16-year-old acquaintance.
The 14-year-old boy then gave first aid until the emergency services arrived.
The teenager dressed as a clown was taken to hospital, while the other was released to his parents.
The clown craze - people dressing up in order to intimidate others - is thought to have started in the US, apparently influenced by Stephen King's horror story, It.
Police have warned that those dressing up as "killer clowns" may be committing public order offences, adding that attending and investigating the incidents uses police resources, as well as stopping them from attending other incidents.