Victoria's anti-corruption watchdog will probe a police shooting at a fancy-dress swingers ball at a Melbourne nightclub.
Two partygoers were shot at King Street nightclub Inflation about 3.30am on Saturday when a "fake gun" was allegedly aimed at officers.
A 35-year-old man dressed as Batman character the Joker was shot in the torso and the woman he was with, who was said to be dressed as Harley Quinn, was shot in the leg.
The Independent Broad-based Anti-corruption Commission on Monday said it will be examining the shooting.
The probe will consider information given by nightclub staff, initial police reports, witness statements and CCTV footage.
"In assessing the matter, IBAC will oversight Victoria Police's investigation being conducted by the Armed Crime Squad and Professional Standards Command and determine further action required," IBAC said in a statement.
The club's owner says the man wasn't holding a gun and was in a "compromising position" with the woman when police "stormed in" and opened fire.
Security told police the gun was a toy or fake weapon rather than a real one but when officers approached the man he allegedly drew the gun from his pants and would not drop it when asked.
IBAC commissioner Stephen O'Bryan QC said he had spoken to Victoria Police Acting Chief Commissioner Shane Patton about the matter.
The nightclub last week lodged a complaint against police over a drug search at the nightclub, unrelated to the latest incident.
IBAC gas confirmed with Victoria Police that arrangements are in place to deal with any "potential or perceived conflicts of interest" in the police investigation, "including as a result of recent civil action taken by the owner of the nightclub".