Ten people were killed and around a dozen wounded when gunmen opened fire during a Jewish holiday event at Sydney's Bondi Beach on Sunday, Australian officials said.
New South Wales police said two people had been taken into custody, and the Australian Broadcasting Corp said one of at least two gunmen was among those killed.
Around a dozen people were taken to local hospitals after the shooting, a New South Wales ambulance spokesperson said.
Prime Minister Anthony Albanese called the incident "shocking and distressing", adding that "emergency responders are on the ground and working to save lives".
"I saw at least 10 people on the ground and blood everywhere,” 30-year-old local Harry Wilson, who witnessed the shooting, told the Sydney Morning Herald.
Israeli President Isaac Herzog said Jewish people who had gone to light the first candle of the Hanukkah holiday on the beach had been attacked by "vile terrorists".
Israeli Foreign Minister Gideon Saar said he was appalled by the shooting.
One of the world's most famous beaches, Bondi is typically crowded with locals and tourists, especially on warm weekend evenings.
"If we were targeted deliberately in this way, it's something of a scale that none of us could have ever fathomed. It's a horrific thing," Alex Ryvchin, co-chief executive of the Executive Council of Australian Jewry, told Sky News, adding his media adviser had been wounded in the attack.
Videos circulating on X appeared to show people on the beach and nearby park scattering as multiple gunshots and police sirens could be heard. One video showed a man dressed in a black shirt firing a large weapon before being tackled by a man in a white T-shirt who wrestled his weapon off him. A different man was seen firing a weapon from a pedestrian bridge.
Another video showed two men pressed onto the ground by uniformed police on a small pedestrian bridge. Officers could be seen trying to resuscitate one of the men. Reuters could not immediately verify the footage.
The attack came almost exactly 11 years after a lone gunman took 18 people hostage at the Lindt Cafe in Sydney. Two hostages and the gunman were killed after a 16-hour standoff.
Sussan Ley, the leader of Australia's opposition Liberal party, said the loss of life in the incident was "significant".
"Australians are in deep mourning tonight, with hateful violence striking at the heart of an iconic Australian community, a place we all know so well and love, Bondi," she said.
