The Australian Rugby Union issued a statement saying its integrity unit was looking into the incident.
"The Queensland Rugby Union has today referred a matter to the ARU integrity unit concerning an incident involving Reds player, Scott Higginbotham in Brisbane last night," a statement read.
"The ARU integrity unit has subsequently launched an investigation into the incident today.
"As the matter is currently with Queensland Police, no further comment will be made at this time."
Higginbotham has played 32 Tests for the Wallabies and returned to the Queensland Reds this season following a stint in Japan.
He played 63 matches for the Ballymore side before spending three seasons with the Melbourne Rebels.
- AAP