Victoria Police is incensed by the conduct as the protests turned violent again in the city on Sunday.

Anti-immigration demonstrators collided with counter-protests, with police allegedly having rocks thrown at them.

First Constable Paul Hogan said police would have a zero tolerance policy on officers being targeted while trying to do their job.

Press PLAY to hear Paul Hogan’s strong comments with Ross and Russ

“We witnessed appalling and atrocious behaviour by some of the protesters in town,” he said on 3AW Breakfast.

“We are not tolerant of those who break the law.”

Press PLAY to hear Wayne Gatt’s response to the scenes over the weekend 

Tom Elliott goes head-to-head with city protester following day of violence