South Sydney Rabbitohs

Gosiewski, 22, made his NRL debut in the Round 10 victory over the Parramatta Eels and went on to play five first grade matches in 2016.

Police said they would work with the NSW Crime Commission and they have the full support of the NRL.

Dozens of players, officials and members of the public are expected to be interviewed.

Earlier this year, the Organised Crime Squad confirmed it was investigating allegations of match-fixing in two NRL games from last year.

Those games were a round 16 game between the Manly Sea Eagles and the South Sydney Rabbitohs, and a round 24 match between Manly and the Parramatta Eels.

The hosts looked in complete control up by 14 points with seven minutes to go, but a late double to Sam Burgess set up a dramatic final minute with a Cody Walker kick just eluding Aaron Gray from the last play of the game. 

The Rabbitohs looked the better side in the first half and even led with 22 minutes to go but were eventually run down by a Penrith team desperate to celebrate skipper Peter Wallace's 200th NRL game with a win. 

It was revealed on Tuesday afternoon that the Roosters had signed the 24-year-old on a two-year-deal starting in 2017. 

Maguire said he would have liked to have kept Keary in Redfern beyond 2016 but conceded salary cap pressures had played their part in the decision. 

"All those great players that you have let go of at some stage; it's about the salary cap and what goes on in club land," he said. 

"Luke and I have talked about him staying but also the opportunities for him to leave, and for various reasons he's chosen those.