The Frankfurter Rundschau reported a silver Mercedes station wagon drove into the crowd at 3.30pm local time this afternoon. It happened during a procession in Volkmarsen, in the Waldeck-Frankenberg district in northern Hesse. The driver of the car was arrested, the police in Kassel said.
Ambulances, police and fire services are on the site.
The Mayor of Volkmarsen, Hartmut Linnekugel, and District Administrator Dr. Reinhard Kubat, are also at the scene.
It comes as the threat level in Germany remains high after a man killed nine people in a shooting in the Frankfurt suburb of Hanau last week.
He then turned the gun on himself.
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