Three dead, including one child, in Dutch stunt truck accident
Hans Gerritsen, mayor of the eastern city, said at least a dozen people were injured, five of them seriously.
A police spokeswoman confirmed there were casualties but could not say how many.
A video published on Facebook showed the so-called monster truck driving over a row of cars lined up for the stunt before losing control and ploughing over the barriers behind which the spectators were standing.
Helicopter ambulances were dispatched to the scene of the accident from across the entire region, including from neighbouring Germany, local media reported.
(Reporting by Thomas Escritt; Editing by Mark Trevelyan)