Police are probing an incident involving South Sydney Rabbitohs star Cody Walker, which the player himself instigated.

On Sunday, TV station Nine News reported Walker had informed police of an attempt to blackmail him for 20,000 Australian dollars over a video that allegedly shows him kicking another man in the chest.

The Rabbitohs did not refer specifically to any incident, adding Walker himself has not been the subject of a police enquiry and the NRL's Integrity Unit has been informed.

A Souths statement read: "The South Sydney Rabbitohs are aware of an incident involving player Cody Walker which took place in northern New South Wales in October 2019.

"The NRL's Integrity Unit have been informed.

"At no stage has Cody Walker been the subject of a police enquiry in relation to this incident.

"The Rabbitohs will be making no further comment on this matter at this stage as it is part of an ongoing police enquiry instigated by Cody Walker himself."