Tens of thousands of protesters have flooded Sydney’s iconic Harbour Bridge as part of an enormous pro-Palestine demonstration.

The number of protesters is estimated to have reached 90,000, with the packed crowd streaming across the landmark after the Supreme Court rejected a bid to block the anti-war protest.

Protesters started crossing the bridge about 2pm, chanting “free, free Palestine” and waving placards.

Some could also be heard chanting “death, death to the IDF”, a reference to the Israeli Defence Force.

At 3pm, the NSW Police issued an urgent request for protesters to stop the march on safety fears, citing a possible “crush” at the northern end of the bridge.

“Participants have been asked to stop proceeding across the bridge to avoid a crowd crush at the northern end of the harbour bridge,” the police said in what they called a “protest safety intervention”.

“Once the procession has come to a halt, protesters will be asked to turn around and walk back toward Wynyard to avoid a risk of injury due to the huge number of people taking part.

“Police believe the safest route back is to walk back across the bridge given the huge numbers to avoid overwhelming the public transport system and a potential crowd crush scenario.”

The crowd started dispersing from the bridge about 3.30pm and traffic started crossing the bridge about 4.30pm.

A number of famous faces joined in the protest, including former NSW Labor titan and former foreign affairs minister Bob Carr, soccer icon Craig Foster and Julian Assange.

Boxer Anthony Mundine and journalist Antoinette Lattouf were also spotted in the crowd.

There were eerie scenes ahead of the march with the landmark shut down completely.

The bridge was closed in both directions — with traffic diverted through the harbour tunnel — with authorities warning they will crack down on unlawful and anti-social behaviour ahead of the planned march.

On Sunday afternoon, police said the bridge would remain closed for longer than originally planned to let protesters cross back over the bridge after the march.

Acting Assistant Commissioner Adam Johnson said protesters would now be able to turn around, facilitated by specialist tactical police.

“People who travelled from Sydney’s northern suburbs can leave the group, and North Sydney Train Station will remain open and operating as originally intended, but due to the risk of a potential crowd crush scenario at the train station, we will now provide the third option of allowing protesters to walk back across the Bridge and disperse in the CBD.

WILD FOOTAGE of Sydney Harbour Bridge (2.15pm) with huge protest taking place right now.

— Peter Deppeler (@Peter_Deppeler) August 3, 2025

“This means the Bridge will remain closed for a longer period than originally planned, until the operation concludes.”

He urged all involved to obey directions from police.

“We do not have an alternative,” Mr Johnson said.

The march gained international media attention on Sunday, with the BBC, France24 and Singapore’s Straits-Times all reporting on the event.

Separately, another pro-Palestine protest formed outside Melbourne’s State Library, with organisers walking to the King Street Bridge in solidarity with the Harbour Bridge demonstration.

The Melbourne protesters reached a police barrier ahead of the bridge.

Officers in riot gear blocked the protesters from crossing the bridge, where the protesters themselves were planning to engage a blockade.

One protester at the rally was seen with a sign reading: “death, death to the IDF”.

Another burned an Australian flag on the road.

Greens senator Mehreen Faruqi was booked to speak at the Sydney rally.

So too Mr Foster, the ex-Socceroos captain, as well as journalist Antony Loewenstein, actor Meyne Wyatt, writer Randa Abdel-Fattah, the Maritime Union’s Paul Keating, activist Tania Safi and Amnesty International’s Mohammed Duar.

Sydney Lord Mayor Clover Moore lent her support to the protesters saying: “Discomfort from traffic can’t be compared to what’s happening in Gaza”.

Jewish Council of Australia Executive Officer Sarah Schwartz backed the protest saying the marchers were “crying out for moral leadership”.

“It is a time for all of us, including those in positions of power, to do everything they can to halt an active genocide and stand with the people of Gaza.”

Executive Council of Australian Jewry co-chief executive Alex Ryvchin, however, said there was “a lot of dismay” in the Jewish community over the march.

“We take comfort knowing that the vast majority of Australians want no part of this,” he said.

“We continue to pray for the starved and tortured hostages still held in Gaza, whose fate is ignored or belittled by the protesters.”

The rain bucketed down, but the organisers pushed through with the march.

“We’re gathering in Lang Park now to march across the Harbour Bridge, already there are hundreds of people and we’re expecting thousands more,” one of the organisers said in a video on social media.

“Don’t let the rain put you off, come along, we’re going to start the rally at 1pm and then march across the bridge in our thousands. Be here.”

Advice from Sydney’s Transport Management Centre said the bridge was now closed in both directions, with travellers advised to avoid the CBD.

“Those who must travel should allow plenty of extra travel time and consider alternative routes such as the Gladesville Bridge and Victoria Road,” the advice read.

“Traffic will be very heavy on the surrounding road network throughout the day, with extensive queuing expected in the Sydney Harbour Tunnel, Western Distributor, Anzac Bridge and Rozelle Interchange.”

Hundreds of officers were deployed to the demonstration, with NSW Police warning that “unlawful behaviour” would not be tolerated.

Central Metropolitan Region Commander, Acting Assistant Commissioner Adam Johnson said the deployment was for the safety of the community.

“The first and upmost priority for NSW Police is always the safety of those protesting, other members of the public who may be impacted by the protest, and the officers involved in the operation,” Mr Johnson said.

“Police will have a high-visibility presence at the operation today and will work with participants to ensure there are no breaches of the peace.

The Bureau of Meteorology predicted 10 to 35mm of rain on Sunday, but organisers claimed as many as 50,000 people could take part.

Protesters gathered at Lang Park in the Sydney CBD at 1pm before marching across the bridge.

Beginning at York and Grosvenor streets at 1.30pm, protesters then filed onto the bridge before finishing on the northern side of the bridge at Bradfield Park, according to rally organisers the Palestine Action Group.

The march is expected to last three hours.

Federal Opposition Leader Sussan Ley said on the ABC that the protest “doesn’t sound peaceful” and questioned why a major route was being shut down.

“I respect the right of free speech and protest, but this is taking it to another level,” Ms Ley said.

“We don’t need to shut down something as important as the Harbour Bridge and there is work being done on the Metro as well, so this is going to be incredibly chaotic for Sydneysiders today.

Indigenous Australians Minister Malarndirri McCarthy urged attendees to “protest peacefully” and to look out for others.

“It is going to be a significant day down in Sydney today and with the court decision that came through yesterday, I believe, but I would just encourage people to protest peacefully,” she said.

Traffic on the bridge was closed from 11.30am and reopened after 4pm.

Residents and motorists were urged to avoid the area.

Bus services terminated in the CBD on the south side of the bridge and at North Sydney and St Leonards on the northern side.

Transport for NSW Executive Director Operations Management Craig Moran asked drivers and commuters to avoid the CBD during the protest.

“The closure will not only impact the Sydney Harbour Bridge, but will have a flow on effect throughout the public transport and road network,” Mr Moran said.

“There will be significant delays and disruption so if you must travel, allow plenty of additional journey time, particularly for any critical travel, such as going to the Airport.

Trains will be running across the Harbour Bridge during the march, but delays are expected given the number of people predicted to be streaming into the city.

Transport for NSW says that “extensive” queues are expected at the entrance to the Sydney Harbour Tunnel, with a flow-on effect expected for the rest of the traffic network.

Motorists were urged to consider alternative routes and allow plenty of extra time, including going from the northern beaches and north shore to the airport.

The Metro service will not operate between Tallawong and Sydenham on Sunday due to trackwork.

Buses replaced Metro services between Tallawong and Chatswood.

Palestine Action Group organiser Josh Lees, who has been the public face of the group’s push to hold the historic march across the bridge, hailed a NSW Supreme Court decision on Saturday as a “huge victory for the Palestine movement in this country”

Premier Chris Minns had publicly expressed his opposition to the march.

The NSW Police made an application to the NSW Supreme Court to block the protesters being issued with a Form 1, which affords protesters protection from anti-assembly laws.

However Justice Belinda Rigg refused the Commissioner’s application.

“The fact the proposed assembly is likely to cause significant inconvenience to residents … is far from determinative,” Justice Rigg said in her judgment.

“If matters such as this were to be determinative, no assembly involving inconvenience to others would be permitted.”

The Palestinian Action Group said in a social media post: “Tomorrow we are going to make history!

“We will hold a massive march over the Sydney Harbour Bridge, dedicated to using our people power to stop the genocide in Gaza.

“We are working with police and NSW transport to ensure a safe, family-friendly event for everyone.”