“We have been made aware of a video of a small gathering of people at a home on Sunday night, including three Fremantle players,” the Dockers spokesman said.
“We are in the process of speaking to the players involved and gathering all the relevant details and information.
“Once that is completed, the club will be in a position to comment further.”
The alleged incident involving Fremantle players comes just days after NRL players Nathan Cleary, Latrell Mitchell, Josh Addo-Carr and Tyronne Roberts- Davis were fined for similar offences.
Last month, North Melbourne players Cameron Zurhaar and Nick Larkey were forced to apologise for hosting a party and breaching social distancing guidelines.