The owners of Australia's Dreamworld have been criticised for not directly contacting the families of the four people killed on one of its rides.
The family of two of the victims was said to be "furious" after the theme park's parent company claimed it had offered assistance.
Ardent Leisure's CEO, Deborah Thomas, has promised to donate her bonus to the victims' families via the Red Cross.
Plans to reopen the park on Friday for a memorial will now not go ahead.
Dreamworld said in a statement that police had advised they needed more time to complete their investigation.