Young people fought again in a Berlin outdoor pool. One fell from a staircase and injured himself, another was knocked unconscious, the police said. On the slide in the summer pool in Humboldthain (Gesundbrunnen), a dispute broke out between a group of four boys and two other young people on Wednesday afternoon.

A 14-year-old is said to have tried to push ahead, collided with the group of four and fell off the stairs or was pushed. He suffered a laceration to his head, police said. Security guards also intervened, but the argument continued in a meadow.

The group of four is said to have hit and kicked a 15-year-old companion of the injured man. The victim lost consciousness and was treated by a doctor who happened to be there. Paramedics took the two injured to hospitals, police officers arrested a 14-year-old.

In the previous months, there had already been three major fights and riots in Berlin swimming pools, in which the police had to intervene. Around 170 security guards from private security companies are on duty in Berlin’s outdoor pools on hot weekends. The baths spend 1.5 million euros on this every year.

Most recently, a large group of 50 young people stormed the diving tower in the Olympiabad in Charlottenburg on Sunday. The police had to be alerted and the pool closed. The action may have been planned and started with a flash mob, said a spokesman for the baths.