Shocking moment partygoers brawl in a Sydney nightclub

Up to thirty partygoers were involved in a bloody all-in brawl overnight with some patrons describing the scene akin to a 'terror attack.'

The brawl erupted at Sydney's Odyssey Bar after two women got into a heated argument leaving one woman without hair and another without her fake nails.

The fight started about 11.30pm at the bar cum restaurant on Norton Street in Leichhardt, a suburb in the inner west of Sydney.

It is unclear what the women were fighting about.