"20 employees were injured," Berlin police said on their Twitter account.
It is noted that law enforcement officers detained 231 demonstrators.
The action brought together from 8 to 10 thousand people.
Many of them did not wear protective masks.
Some protesters threw stones and bottles at the police.
In early April, it was reported that protests were held in a number of European countries against the restrictions imposed by the authorities in connection with the coronavirus pandemic.