Pic: Roozi Araghi, Luke Dorsett, Kate Goodchild Credit: Getty/Facebook
We're learning more about the four people who lost their lives on Dreamworld's Thunder River Rapids ride.
They included 32 year old Kate Goodchild, her 35 year old brother Luke Dorsett and his partner Roozi Araghi.
It's understood the group were living in Canberra, but had been on a trip to the Gold Coast.
Kate's daughter - a 12 year old - was reportedly also on the ride at the time but was thrown clear. A 10 year old child was also there, watching on as the horror unfolded. Nearby, stood Kate's partner, who was taken to a nearby Police Station soon after.
The mother of Kate and Luke has described the 'truly terrible day', and says she's 'going through unimaginable pain'.
The fourth person killed in the tragedy was a 42 year old woman. Her identity is yet to be confirmed.
Dreamworld management has confirmed the park will remain closed for today out of respect for the victims and their families. It is understood the park is likely to remain closed for longer, as police, workplace health and safety and the coroner continue investigating.
Queensland Premier Annastacia Palaszczuk says the crews who tried to help will be offered as much support as they need:
"Understandably, what people have witnessed has been absolutely horrific. I am absolutely determined to make sure we get the necessary counselling to those who visited the park and most importantly to those who witnessed it"
Prime Minister Malcolm Turnbull echoed the Premier:
"Theme parks are a place for family fun and happiness... not tragedy"
"This is a very very sad and tragic event. Our thoughts and prayers are with the families of those who lost their lives. It is a very sad day and we trust that there will be a thorough investigation of the causes of this accident"
Yesterday's tragedy is being described as the worst in Australia's theme park disaster since 1979, when 7 people died in a fire on Sydney's Luna Park Ghost Train.
OTHER SERIOUS ACCIDENTS ON AMUSEMENT PARK RIDES OVER PAST DECADE:
US - August 2016: 10-year-old boy receives fatal neck injury while going down the world's highest water slide in Kansas City.
SCOTLAND - June 2016: 10 people, including eight children, injured in an amusement park when a roller coaster derails and plummets from the track.
ENGLAND - June 2015: Two carts from a roller coaster in a Sheffield amusement park collide, leaving 16 injured.
GERMANY - August 2014: 11-year-old girl killed when she is run over by the Spinning Barrels ride in a western German amusement park.
AUSTRIA - October 2010: Man working on a ramp of the flying roller coaster Volare falls to his death after he's hit by a cart and pushed from the track, while one passenger is severely injured.
GERMANY - September 2009: 11-year-old girl dies after falling out of a water ride at a local festival in Bavaria.