In a press release, Victoria police's acting senior sergeant Sharon Darcy made her force's concerns clear.

BBC: Image of Mildura inaccuracy on Apple Maps

"We believe at least 10 or more people have witnessed some of the events, " Detective Senior Sergeant Brian Archer said on Thursday.

BBC: Jesse Ryder: Police seek motive for NZ cricketer attack

"Unfortunately Mr Ryder has no recollection of what took place or the events leading up to the incident, " Detective Senior Sergeant Brian Archer said.

BBC: NZ cricketer Jesse Ryder 'has no memory of attack'