Dozens of NRL players and officials are expected to be interviewed in a match-fixing investigation launched by NSW Police.
Police said on Wednesday they had the full support of the NRL and would work closely with the NSW Crime Commission after launching Strike Force Nuralda.
It comes following a review of information into "reported cheating at gambling and match-fixing" in the NRL.
NRL chief executive Todd Greenberg reiterated the league's support and said guilty parties faced life bans.
"We are not going to pre-judge any person associated with the game while this process is underway," he said.
"But I repeat my earlier warning that if any person is convicted of match-fixing they will face a life ban from any involvement in rugby league."