In Nuremberg, around 80 revelers gathered on the Kornmarkt in the old town after the curfew.
When the officers tried to stop an attack on a woman, the situation escalated.
Nuremberg - Because of the nightly riot, the police had to vacate a place in the city center on Saturday night in Nuremberg *.
Several officers were injured, including throwing bottles.
Over a dozen people were held in police custody.
Escalation in the middle of the old town of Nuremberg: police clear space - arrests
After the outdoor catering had been closed, the mood among the approximately 80 people who remained in the square on the Kornmarkt became increasingly heated due to alcohol, a police spokesman reported.
A man hit a woman while doing it.
When officials intervened and wanted to arrest the suspect, numerous people expressed their solidarity with the man and sometimes attacked the emergency services.
According to the information, bottles were also thrown towards the police.
One officer was hit in the head and slightly injured.
Nocturnal riot in Nuremberg: police are attacked
The man who was about to be arrested managed to escape in the scramble.
Because the situation did not calm down, the police finally cleared the Kornmarkt around 4:30 a.m.
Instructions from the officials to leave the area were previously unsuccessful, it said.
In the course of the evacuation, the emergency services were again pelted with bottles.
The police used sticks and pepper spray.
In the end, 13 people were taken into custody.
A policeman suffered a head wound from a bottle throwing from which glass fragments had to be removed in the hospital.
The officers initiated several investigations against numerous people, among other things on suspicion of dangerous bodily harm, breach of the peace and resistance to police officers.
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