For some context: This protest took place in the context of the Rosa Luxemburg conference, which is a yearly event organized by the newspaper “junge Welt”. As they reported, multiple participants of the protest were heavily injured, including broken bones and a life threatening injury of an elderly man (German interview with a paramedic). As far as I can tell, the injured policemen are, unfortunately, not in a life threatening situation. The headline that they are injured is probably only right wing propaganda.