The NRL is investigating whether Nathan Cleary broke social distancing rules on ANZAC Day after a photo emerged of him with a group of women.
The Nine Network on Tuesday broadcast photos of Cleary with a group of at least five girls, that were reportedly taken on April 25.
Penrith had just hours earlier contacted the NRL about the photos after learning of their existence, with the league looking into the matter.
"Penrith Panthers acknowledges the photos of Nathan Cleary being shared by the media in regards to social distancing regulations," a Panthers statement read.
"The club was first made aware of the photos on Tuesday morning and immediately forwarded them to the NRL.
"The matter is now in the hands of the NRL and the club will be making no further comment at this time."
It comes just a day after South Sydney's Latrell Mitchell and Melbourne's Josh Addo-Carr were both fined $1000 by NSW Police for flouting social distancing laws on a mid-north coast property over the weekend.
In the images broadcast by Nine, Cleary is seen sitting on a couch alongside the girls, with one laying across him.
According to the network, the star NSW halfback contacted his Panthers teammates and club officials to apologise and take full responsibility.
Nine said Clearly claimed the women were friends who had come to his house on ANZAC Day briefly before departing.
NSW government rules implemented recently during the coronavirus pandemic have restricted house visits.
However, those will be eased from Friday when a maximum of two adults - and there children if they have any - will be permitted to visit another household.