Several people were injured after a car crashed into a crowd at a carnival procession in Volkmarsen, a German town east of Duesseldorf, police said.
The driver, a 29-year-old German citizen, was arrested, a police spokesman was cited as saying by broadcaster Hessenschau.
The incident took place on Monday, but police said it was too early to confirm what caused the car to crash on the south side of the town, outside a supermarket.
Amateur video footage showed a silver Mercedes station wagon with local licence plates and its hazard lights blinking on the pavement while emergency crews walked by.
Carnival is popular in parts of western Germany, especially in Rhineland cities such as Cologne and Duesseldorf, where festivities peaked on “Rose Monday” (February 24) with tens of thousands attending street parades featuring comical or satirical floats.
Volkmarsen is in Hesse, a central German state where all carnival parades across the state were cancelled as a precaution.
However, state police said they not have any indication of a threat anywhere else in Germany at the moment.
Al Jazeera and news agencies