There's no need for an independent investigation into the arrest of a young man at the Sydney Mardi Gras, Police Minister Mike Gallacher says.
A video has emerged of an 18-year-old man with a head wound being thrown to the ground by police while handcuffed during the festival celebrations on Saturday.
At least six officers were involved in his arrest.
The NSW Greens and a City of Sydney councillor have called for an independent inquiry into the matter, saying the investigation shouldn't be left to police.
Mr Gallacher says the NSW Ombudsman will review the incident and an additional investigation is not necessary.
'For anyone to suggest that the ombudsman is not independent, they're being very, very unfair,' he told reporters in Sydney on Wednesday.
'I'm satisfied the ombudsman is independent, is truly independent of the NSW Police Force.
Mr Gallacher added that he had not received any complaints about excessive use of force or brutality by police at Mardi Gras.
As the area is 'saturated' with CCTV cameras, there will be plenty of footage available to review and any judgment on police actions should wait until the investigation is complete, he said.