Breaking: One Nation's Melbourne fundraiser moved over protest concerns

Pauline Hanson and Barnaby Joyce were both slated to attend tonight's event. (ABC News: Ian Cutmore )

A One Nation fundraiser in Melbourne has been moved to an undisclosed location after several protest groups vowed to demonstrate outside, the party says.

Party leader Pauline Hanson and MP Barnaby Joyce were both slated to speak at the fundraiser, which was being held at Giorgio Casa, an Italian restaurant in Moonee Ponds in Melbourne's inner-north.

The Party told the ABC the decision to move the event was due to advice from Victoria Police and the Australian Federal Police.

A Victoria Police spokesperson said it was not aware of any threats made to the venue or event, but said it was the restaurant that decided to cancel the gathering.

"Police will maintain a presence in the area due to potential protest activity," the spokesperson said.

Several anti-racism groups had posted online rallying people to protest at the event, saying they planned to meet nearby, before marching to the restaurant.

Omar Hassan, a spokesperson for one of the groups organising tonight's demonstration, the Victorian Socialists and Campaign Against Racism and Fascism, said the group wanted to express that One Nation was "not welcome in Melbourne".

"The fight against One Nation and everything they stand for will continue," he said after news of the venue change emerged.

The Moonee Valley City Council had posted on social media earlier on Friday, warning the public to avoid the area during the protest if possible.