An employee of a security company was seriously injured in a dispute in a club in Berlin-Mitte.
A guest is said to have hit the 42-year-old in the head with a glass bottle on Sunday night, the police said.
Previously, security forces had separated several fighters on the dance floor.
According to the information on Sunday, the employee was taken to hospital with a serious injury to his eye.
Berlin - The 20-year-old alleged attacker and his 25-year-old companion, who is also said to have hit an employee, were temporarily arrested.
dpa
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