After the death of a man during a police check in Mannheim, the operation was heavily criticized, especially on the Internet.
The police union (GDP) strongly condemned hate and hate messages on social media in connection with the incident.
GdP country chief Gundram Lottmann said such reactions are not only completely inappropriate, but also inhuman.
"We are all affected by the sad incident, especially the officers themselves. The cause of death is currently unknown, and there are no concrete investigation results."
The man's body is to be autopsied soon - according to the State Criminal Police Office (LKA) Baden-Württemberg on Tuesday, it is not yet known when.
The 47-year-old collapsed on Monday during a check by two police officers and died in hospital.
He had resisted the control and had been overpowered by the officers.
It is not yet clear what led to his death.
The public prosecutor's office announced a message for the course of the day.
The left-wing member of the Bundestag Gökay Akbulut (left) from Mannheim called for a complete clarification of the police operation.
They reached many cases of police violence that go unsolved.
"It's especially common when there are no witnesses and no video footage.
Structural deficits in the police force must be examined.
It is important to keep up the pressure with further protest events so that there is a complete clarification.”
Demonstrations in Mannheim and Heidelberg
According to the police, more than 300 people demonstrated against police violence in Mannheim and Heidelberg on Tuesday evening.
At the scene of the incident in Mannheim, demonstrators wrote "police murder" in chalk on a sidewalk and laid flowers.
Videos have been circulating online showing a police officer beating a man lying on the ground in the head.
It has not been clarified whether this video is real or even shows the police check in question.
After allegations of racist violence, the LKA emphasized that the man was not a Turkish citizen.
Such speculation had existed before.
The nationality of the 47-year-old was not announced on Tuesday either.
"It doesn't matter for our investigation," said the LKA spokesman.
The chairman of the Federal Immigration and Integration Council (BZI), Memet Kilic, said that the police, as the executive body of the executive, had far-reaching opportunities to intervene in the basic rights of citizens.
Therefore, it must be subject to vigilant democratic control: "The video circulating on the Internet about the police operation in which a man with a migration background died rightly raises question marks.
It is now all the more important that the Mannheim police, the Baden-Württemberg State Criminal Police Office and the public prosecutor’s office promote a transparent and anti-racist investigation into this death.”
The Lord Mayor of Mannheim, Peter Kurz (SPD), said that everyone was very affected by the death of a person during, after or as a result of a police operation.
"You all know how important it is for us to live together peacefully and respectfully in our city." That's why this police operation raises questions.
These questions have to be answered, and institutions such as the public prosecutor's office and the State Criminal Police Office are called upon to do this.
"I think an assessment of the police operation before the results of these investigations is out of the question and I appeal to everyone to do the same."