On the way to a seriously injured cyclistClimate activists block ambulances in BerlinAfter an accident with a concrete mixer in Berlin, a cyclist was seriously injured.After a traffic accident followed by a knife attack on a busy street in Berlin, both the cyclist who was run over by a concrete mixer and the driver of the car came to the hospital.According to his own statements, the driver of the concrete mixer was attacked with a knife by an unknown person next to his car shortly after the accident.The police are investigating the accident on Bundesallee in the western part of the capital and the suspected knife attack.Because of this blockage, an ambulance is said to have been stuck in traffic, wanting to drive to the accident as quickly as possible."