Thousands of people converged on major Australian city centres on Saturday, staging competing demonstrations that prompted heavy police deployments, the use of capsicum spray and at least one arrest as authorities worked to prevent clashes between opposing groups.

Organisers of the Australia Unites rallies said participants were voicing anger over cost-of-living pressures, health declines, rising violence, financial strain and what they described as climate change denialism. Counter-demonstrations led by Indigenous and Palestinian activist groups gathered as part of a National Day of Action against racism and fascism, responding to an alleged raid by neo-Nazis on an Indigenous camp in Melbourne on Aug. 31.

Melbourne saw some of the most fraught scenes, with state police deploying dozens of officers, including mounted units, to separate the rival demonstrations near Flinders Street Station and Parliament. Authorities set up orange barricades and formed long lines to cordon off areas where the groups were reported to be about 50 metres apart. A local broadcaster showed aerial footage of police lines between the crowds.

Police said capsicum spray was used at one point, with at least one Indigenous sovereignty protester tended to after allegedly being pepper-sprayed outside Flinders Street Station. Victorian police also intervened to stop an attempt by a counter-protester to enter the site known as Camp Sovereignty in King's Domain, a burial site that contains remains from 38 Indigenous clans. The camp, established in 2006 and re-established in 2024, was the scene of violent clashes on Aug. 31 after a March for Australia rally; ten men have since been arrested and charged over alleged assaults and affray, some said to have links to neo-Nazi groups.

In Sydney, Australia Unites protesters had initially signalled an intention to march across the Harbour Bridge but altered their plan after a legal challenge by police. The march instead progressed through the central business district and concluded in Hyde Park, where demonstrators carried Australian and Eureka flags. NSW Police said the operation concluded "with no significant incidents" after they arrested a 50-year-old man for breaching the peace and escorted him from the area. Two people were treated by paramedics but no serious injuries were reported.

"A police operation has concluded with no significant incidents following multiple planned assemblies in Sydney's CBD today," NSW Police said, noting just one arrest. A social media post from Pauline Hanson's One Nation candidate Stuart Bonds praised the Sydney rally: "Well done Sydney...no troubles, no dramas. Done and dusted," he wrote.

Police in several jurisdictions were granted additional powers for the weekend to deal with the protests, including the ability to search people for weapons and to direct the removal of face coverings. Authorities in Victoria and New South Wales said those powers were necessary to reduce the risk of violent encounters between competing groups.

Victorian Attorney-General Sonya Kilkenny issued a public rebuke to those who would use demonstrations to commit offences, saying the government supported peaceful protest but would not tolerate violence. "Do not ever use the cloak of protest to go out there and cause crime," she said, adding that "there is no place for protests that spread harm, that spread hate, that spread fear and violence, and there is certainly no place in Victoria for neo-Nazis."

Smaller rallies were also held in Hobart, Canberra and Brisbane on Saturday; police in those cities reported no similar clashes. In New Zealand, meanwhile, an unrelated but large demonstration drew an estimated 50,000 people to central Auckland for a March for Humanity, a protest denouncing Israel's military campaign in Gaza. Organisers at that rally said nearly 65,000 people had been killed in Gaza since October 2023.

The demonstrations came against a backdrop of heightened tensions in Australia over immigration, Indigenous sovereignty and the presence of extremist groups. Police and officials have said they were closely monitoring social media and public intelligence for any signs that small groups might attempt to incite violence at planned events.

Authorities in Melbourne maintained a visible presence into the late afternoon, keeping officers in place to respond should scuffles erupt. While Saturday's rallies ended with only limited reported injuries and a small number of arrests, officials warned that the potential for flashpoints remained a concern for law enforcement and community leaders.

Investigations into the Aug. 31 King's Domain incidents remain active, and the arrests linked to those events have continued to inform policing decisions at subsequent demonstrations. Police said they would review the weekend's operations and maintain a posture aimed at protecting public safety while upholding the right to peaceful protest.