Dozens of people have been wounded after two rollercoaster trains crashed into each other at a Legoland amusement park in southern Germany.
More than 30 people have been injured, including at least one severely, according to the German news agency DPA.
One of the Fire Dragon roller coaster trains reportedly braked heavily and another then collided with it at the park near Günzburg, Bavaria.
Three helicopters were deployed to the scene, and fire and rescue services were called in to help.
Riders still trapped on the rollercoaster had to be evacuated after the incident with the help of two fire engines.
Legoland said it had immediately started a full investigation and the ride will be closed for the time being.
The company said the train "did not stop completely for until now unknown reasons and made impact."
"The staff immediately followed well-rehearsed safety procedures and guests were immediately evacuated from the trains and attended by trained resort staff," said Legoland Germany in a statement.
"Legoland emergency personnel as well as paramedics, doctors, the police and the firefighters were at site within few minutes. The park area was evacuated," it continued, wishing everyone involved a "quick recovery" and thanking the emergency services.
Last week, a woman died in another roller coaster accident in an amusement park in Klotten in southwest Germany.
The 57-year-old woman fell out of the roller coaster as it was moving and died of her injuries.
The cause of the accident has not yet been identified.