Translated from Dutch NOS TV today:
Several hundred protesters have gathered this afternoon for a Black Lives Matter protest on the Dam in Amsterdam. The group protested against police violence. The immediate cause of the demonstration was, according to initiator Anna, the continuing police brutality against African Americans in the United States. The protest was peaceful.
The initiator of the protest emphasized on Facebook that it was a peaceful protest, which was conducted in silence. With texts on signs and their clothing the demonstrators wanted to express their dissatisfaction with the violence in the US. They carried signs saying “Don’t shoot” and pictures of victims of police violence.
See also here.