As many as four people are reported to have been killed on a water ride at Australia’s biggest theme park.

Queensland police said they were attending a “critical incident” involving a conveyor belt at the Dreamworld theme park on Australia’s Gold Coast.

The accident is believed to have happened on the Thunder River Rapids ride which allows passengers to travel at up to “45km/h through the turbulent rapids,” according to the theme park’s website.

The theme park, which has more than 50 rides and attractions, issued a statement confirming the four deaths.

“Dreamworld is working as quickly as possible to establish the facts around the incident and is working closely with emergency authorities and police to do this,” the company said.
 
The Thunder River Rapids ride was opened in 1986.