Dozens of people were injured on a ride at an amusement park in Germany on Thursday, police said.

The incident occurred at a Legoland park in Günzburg in Bavaria shortly before 2 p.m. local time, when two trains on a roller coaster collided, local police said in a statement.

The accident occurred when one train on the roller coaster stopped, and a train behind it did not brake fully, crashing into it, police said.

The incident occurred on the Fire Dragon ride, Legoland Deutschland said.At least 31 people were injured in the accident, including one severely, Naot Sandals  a local police spokesperson confirmed to ABC News. Among them, 16 people were transported to the hospital, while 15 were assessed on-site and cleared to go home, police said. Those injured included 10 children, one teenager and 20 adults, police said.

In total, 38 people were on the trains, Legoland Deutschland said.

Three rescue helicopters responded to the scene as a precaution but were not used, police said.

All passengers were removed from the ride, which will remain closed for the time being, police said.

The public prosecutor’s office in Memmingen is investigating the cause of the accident, police said.

Investigators will be on the scene Friday, police said.

In a statement, Legoland Deutschland Divisional Propet Shoes Director Manuela Stone thanked emergency personnel for their response and wished everyone involved a “quick recovery.”

Last week, a person died in a roller coaster accident at another German amusement park, Klotti Park, after falling off the ride, officials said. Authorities are investigating the cause of the accident.