Violent clashes erupted outside an event hosting controversial British alt-right commentator Milo Yiannopoulos in Kensington on Monday night.
About 150 hard left and right protesters gathered in front of the Melbourne Pavilion on Racecourse Road and Stubbs Road, where they faced off and fought with sticks.
Riot police then stormed the protest and used pepper spray to subdue the crowd, which included members of left-wing group Campaign Against Racism and Fascism and right-wing groups Reclaim Australia and The Freedom Party.
Leftist protesters held placards stating 'F*** off Nazi scum' and chanted "hey Milo go to hell" and "no Nazis ever again".
The protesters vowed to follow Yiannopoulos around the country, vowing to "unite to fight the right".
The polarising figure, who was been dubbed both a dangerous provocateur and a hero of free speech, was to address his two sold-out Troll Academy Tour shows in Melbourne later in the evening.
Yiannopoulos, 33, has repeatedly made headlines for his alternative right views on minorities.
"I troll for a purpose, a higher moral purpose if you like," said Yiannopoulos , whose press releases call him "World's Most Controversial Man" and who features in university campus disputes over controversial visiting speakers.
"It's a sort of trolling for Jesus ... a way of revealing hypocrisy and double standards and authoritarianism through ridicule."
Earlier this year, the US-based commentator resigned from Breitbart News after he appeared to suggest it was ok for older men to sleep with teenage boys.
Yiannopoulos was also banned from Twitter in 2016 after he made a series of racist tweets about African-American Ghostbusters star Leslie Jones.