Manly winger David Williams will vigorously defend himself against police charges of offensive behaviour and affray over an incident outside a Kings Cross nightclub in May, the NRL club says.

The charges relate to an incident in the early hours of May 27 in the heart of the late-night precinct, in which a 29-year-old Rockdale man alleged he was assaulted outside a club on Kellett Street.

The alleged altercation is also the subject of an investigation from the NRL’s integrity unit and Manly general manager David Perry said the club had launched its own investigation.

“The club has today been made aware of charges against Manly player David Williams,” Perry said in a statement on Wednesday.

“The NRL integrity unit has been advised of the matter and Manly will also conduct its own internal inquiries. David Williams denies any wrongdoing and will vigorously defend the charges.”

Former Kangaroos flyer Williams was reportedly with Sea Eagles assistant coach Andrew Johns and teammate Justin Horo on the night in question, but there is no suggestion Johns or Horo have done anything wrong.

The 26-year-old Williams is due to face Downing Centre Local Court on August 13.

The Rockdale man has also been charged.

The alleged incident is the latest in a string of off-field indiscretions plaguing rugby league.

North Queensland and NSW prop James Tamou was on Tuesday fined $1900, and disqualified from driving for 15 months, after pleading guilty in a Townsville court to drink-driving and driving without a licence.

Canberra centre Blake Ferguson is due to front Waverley Local Court on July 16 after being charged with indecently assaulting a woman at a Sydney nightclub.