

From the article
Police intervened when the protesters allegedly violated the restriction, triggering a confrontation, Bild reported. As tensions escalated, demonstrators reportedly threw bottles and clashed with officers, leaving at least one officer injured. Berlin police confirmed the incident on their official X account, stating that 28 people were detained and insisting that the officers had no choice but to use force against protesters who they claim were acting violently.
was good enough for dailytelegraph.co.nz (the linked source) but if you find any other sources please link