>> Piecing together a tragedy at Australia's biggest theme park. Forensic police on Wednesday, scouring CCTV footage and inspecting the river rapids ride, where four people were killed the day before when the raft flipped over.>> Our thorough investigation is being initiated, under the direction of the Coroner. The Queensland Police Service will be applying all resources necessary to examine every aspect of what's happened here.
>> Tuesday's accident at Dreamworld on the Gold Coast ranks among the world's deadliest. Well wishers turning up to remember the victims.>> It's just such a sad incident, we're just thinking of the family today.>> Investigators say the accident happened when two rafts collided, trapping the four adults who became caught in the ride's machinery.
But throwing free two young girls, 10 and 13 years old.>> In terms of how they escaped, maybe through the providence of God or somebody, but it seems from what I've seen, almost a miracle that anybody came out of that. If we're gonna be thankful for anything, I'm thankful for that.
>> Media report say the ride had experienced problems earlier in the day before the accident. Inspector say, they will be looking into those claims. It would be up to the State Coroner to decide if any charges will be laid.>> The park has been shut down and looks set to stay that way.