The NRL Integrity Unit is probing an alleged incident involving Brisbane Broncos players Reece Walsh and Ezra Mam in Bali.
Nine Newspapers reported the pair were involved in an alleged incident at a Bali nightlife hotspot.
The Sydney Morning Herald alleged a fan attempted to take a selfie with Walsh, which then led to Mam intervening and taking the patron's phone away.
In a short statement, Brisbane acknowledged a probe is being undertaken by the NRL.
"We are aware of the investigation. No further comment," Brisbane said in the statement.
ABC Sport has reached out to the NRL for comment.
This continues a turbulent time at the Red Hill-based club after the departure of coach Kevin Walters following a disappointing 2024 campaign.
After losing a classic grand final to the Penrith Panthers the year prior, the Broncos limped to 12th in 2024 and missed the finals.
Walsh, the Brisbane and Queensland State of Origin fullback, battled through injury for much of the season.
Mam's season ended prematurely when he injured his ankle in defeat to the Gold Coast Titans.