The Sydney Roosters have handed half-back Mitchell Pearce a $20,000 fine and stood him down for one NRL game as a result of their investigation into his role in a Kings Cross nightclub incident.

Earlier on Tuesday, police concluded their investigations into incident, which saw the Roosters' star issued with an infringement notice for failing to leave a licensed premises, and said no further action would be taken by them.

However, later on Tuesday, the Roosters released a statement saying sanctions had been issued against Pearce and back-rower Boyd Cordner, who was with the half-back on the night.

The statement said Pearce had been stood down from one Roosters NRL match and fined $20,000 to be donated to charity. Additionally, a counselling program will be devised for him to adhere to.

Cordner was issued with a $5,000 fine ($2,500 suspended).

"The club is most disappointed with the events of the weekend. The club and NRL have strong policies in place and there is a process that has had to run its course," said Sydney Roosters Chief Operating Officer Football, Brian Canavan.

"Mitchell and Boyd have accepted the club sanctions and shown genuine remorse for the negative spotlight both have attracted to the Roosters and the game by breaching the club’s and NRL's standards.

"Both are important contributors to our club, and the game, and we will continue to work closely with them to ensure their continued personal development off the field."

Pearce is available for State of Origin one selection, after the NRL integrity unit agreed the Roosters penalties were enough punishment for the New South Wales half-back.

Police take no action

Police issued a statement on Tuesday saying they had finished looking into the incident.

Officers had arrived at a nightclub on Roslyn Street, Potts Point on Saturday night after receiving a complaint about a patron.

Pearce, who is in line to be the New South Wales half-back for the State of Origin series, was given an infringement notice for refusing to leave a licensed premises.

It was alleged that he had an altercation with a woman at the club before being asked to leave.

"Detectives conducted further investigations into the matter including reviewing closed-circuit television footage and making an appeal for anyone with information to come forward," NSW police said in a statement.

"About 10pm last night (May 12), a woman made contact with police and spoke to investigators.

"The woman, who wishes to remain anonymous, declined to make a statement to police and did not wish to proceed with any further action."