Dreamworld: Police 'failed to contact' victim's relatives

Flowers placed outside Dreamworld on Queensland's Gold Coast

Grieving relatives of a victim of Australia's Dreamworld ride tragedy have criticised police for not contacting them.

Roozbeh Araghi's family said no-one had been in touch and their own attempts to get information from police had failed.

Four people died on the Thunder River Rapids ride at the Gold Coast theme park on Tuesday.

Queensland Police said it had contacted members of the family but would review how next of kin were notified.

Roozbeh Araghi, 38, died alongside partner Luke Dorsett, 35, Mr Dorsett's sister Kate Goodchild, 32, and Cindy Low, 42.

• Dreamworld: Who were the victims?

"We resorted to even ringing [emergency telephone number] triple-0 and trying to get through to the police station via that," Mr Araghi's brother, Simon, told the Australian Broadcasting Corp on Thursday.

"We had three of us on hold for well over an hour."

But Queensland Police said it had been in touch with the family.

"Officers have been in contact with members of the family from the beginning of this tragic event and will continue to maintain contact and support with the family through the investigation team's dedicated Family Liaison Officer," police said in a statement.

(L-R) Kate Goodchild and Luke Dorsett were siblings, while Roozbeh Araghi was Mr Dorsett's partner. Cindy Low was not known to the three.

Dreamworld's parent company Ardent Leisure contacted the Araghi family on Thursday to express their condolences and offer support.

Ardent Leisure CEO Deborah Thomas said she would phone the families personally. She said she would also donate her company bonus to them via the Red Cross.

But Mr Araghi said he would have preferred Ms Thomas's call earlier.

"They apologised and I think wanted to see if they can work through things with us privately, but to be honest it's not really on our radar at the moment," he said.

Dreamworld cancelled a planned memorial re-opening on Friday and will remain closed until at least Monday.

Worst amusement park accidents

• Eight teenagers were killed in a 1984 fire at the Six Flags Great Adventure amusement park in New Jersey, US. Arsonists are believed to have started the blaze

• Six people died in a failed simulated rocket launch in Shenzhen, China, in 2010. One of the cars on the centrifuge ride became loose, lost power and the ride fell to the ground in flames with 44 people inside

• Five children were killed when the Battersea Park Big Dipper malfunctioned in the UK in 1972. Rope hauling cars to the top of launch slope broke and a safety mechanism failed, causing cars to roll into the boarding area

• Three died at the Galaxyland Amusement Park in Alberta, Canada, in 1986. The last car of a four-car train on the Mindbender triple loop ride came away from the track, throwing off passengers before crashing into a concrete pillar

• One person died in a rollercoaster accident at Expoland in Osaka, Japan, in 2007; another was killed at the Darien Lake theme park in New York State, US, in 2011

• Sixteen people - including two teenage girls who needed leg amputations - were injured at UK's Alton Towers park in 2015. Operators failed to notice a stationary car on the 14-loop Smiler ride and overrode the stop mechanism, sending the next car into it