A Facebook page for a planned anti-lockdown walk has been taken down, with the social media giant deeming it violates Melbourne's stage four COVID-19 restrictions.
Hundreds of Facebook users had signalled their intent to walk the Royal Botanic Gardens' Tan track on Saturday.
The "Melbourne Freedom Walk" claims to be legal and asks citizens to "come together, get healthy and talk about getting our freedoms back".
But the online page was hit with a "legal restriction" on Wednesday night, making it unavailable to users based on "local law".
"When governments believe that something on the internet violates their laws, they may contact companies like Facebook and ask us to restrict access to that content," a screenshot of the Facebook notice reads.
The event organiser said it meant Facebook had taken down the page, shedding 1100 users who had shown interest in the walk and 340 who had committed to attend.
It has since been re-posted for the same time and place, but garnered considerably less attention.
Victoria Police said it was monitoring potential protest activity for this weekend and wouldn't hesitate to take action.
"We will have resources committed to ensuring that people who deliberately breach the directions receive fines or are arrested, if necessary," a statement on Thursday said.
"Anyone thinking of attending a protest can expect the same swift and firm response from police as has occurred at previous protests that were in breach of chief health officer restrictions."
Police Commissioner Shane Patton has flagged there could be more protests at other locations at the weekend.
"Apparently Saturday, they're planning for the Tan and it might not be there, there could be other areas, but we will have the same approach," he told 3AW on Thursday.
Other "freedom" rally posters for this Sunday and every Saturday until restrictions end are also circulating online.
Four men were charged with incitement in the lead-up to last Saturday's Freedom Day rally in Melbourne, as about 200 people gathered at the Shrine of Remembrance and Albert Park.
Violent scuffles between protesters and police broke out, resulting in 17 arrests and more than 160 fines.
The organiser of this Saturday's "walk" is Tony Pecora, multiple media outlets have reported.
Businessman Clive Palmer dropped Mr Pecora as a United Australia Party candidate for the federal seat of Melbourne prior to the 2019 election after he peddled September 11 conspiracy theories.