Dreamworld will remain closed to the public until at least after the funerals of the four victims of this week's tragedy - including Kiwi Cindy Low - but staff are set to be invited back to work from next week.

In a statement released from Dreamworld today, chief executive Craig Davidson said staff would be fully paid while the park is closed following the fatal malfunctioning of its Thunder River Rapids ride.

"Our hearts and thoughts are still with the families affected by this tragedy. We are continuing to co-operate with the authorities throughout the ongoing investigation."

From next week there would be a gradual process of inviting staff back to work should they wish to return.

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"There are still many things to do at the park for staff such as feeding animals, gardening and cleaning."

Flowers laid at Dreamworld for the victims of the accident. Photo / AP
Flowers laid at Dreamworld for the victims of the accident. Photo / AP

Davidson stressed that no customers would be left out of pocket as a result of Tuesday's tragedy.

All-pre-season tickets would be refunded and season passes could either be extended while the park is not in operation, or refunded on a pro-rata basis.

"Dreamworld is taking customer details and working through the refund process."
Workplace Health and Safety Queensland officers were on site from today and had full access to the park.

"We are giving them every support they need," Davidson said.

Four people, including Cindy Low, 42, died after the Thunder River Rapids ride malfunctioned.

Dreamworld has faced strong criticism for its handling of the tragedy, with family members complaining the park's executives waited too long to contact them.

The Australian Workers Union has also levelled criticism at Dreamworld's for its safety record, saying it has been warning about problems at the park for years, something the park has denied.