Terrorist gunmen have killed 15 people including a 10-year-old girl and a British-born rabbi in the Bondi Beach attack.
The father-and-son shooting has been declared a terrorist incident targeting a celebration in Sydney, Australia, on the first day of Hanukkah, the Jewish festival of lights.
Here’s what we know so far:
What happened?
Two gunmen, armed with what police described as "long guns", opened fire on more than 1,000 people attending a Jewish festival in the Archer Park area of Australia's most famous beach at 6.47pm local time on Sunday.
Father-of-two Ahmed al Ahmed, from Sydney, was hailed a hero for tackling one of the gunmen before wrestling his weapon away from him.
Local residents and emergency services worked desperately to help the injured while beachgoers fled the scene.
The older of the gunmen, a 50-year-old man, was shot by police and died at the scene while his 24-year-old son suffered critical injuries and was taken to hospital under police guard.
At a press conference on Monday afternoon, New South Wales (NSW) state police commissioner Mal Lanyon said the younger gunman is expected to live to face criminal charges.
"We do have a 24-year-old male in hospital at the moment. Based on his medical condition it is likely that person may face criminal charges," he said.
A total of 42 people were taken to hospital where the 10-year-old girl was among those who died, the force said.
Two "active" explosive devices were found and taken away by a bomb disposal unit, with a third device found at the Bondi scene on Monday and taken away for forensic examination.
Who are the victims?
The age range of those who died is from 10 to 87 years old.
A total of 14 people died at the scene with a 10-year-old girl and 40-year-old man dying in hospital.
Police also said 42 injured people, including four children, were taken to hospitals across Sydney.
As of late Monday afternoon, 27 people were receiving care in hospitals across Sydney, NSW Health said.
Six people remain in critical conditions with the others in serious and stable conditions.
Two police officers: a constable and probationary constable, suffered gunshot wounds, and both remain in serious but stable conditions.
British-born rabbi Eli Schlanger, who was assistant rabbi at Chabad of Bondi, was the first victim to be identified.
His family has described him as a "joyful rabbi".
The father-of-five grew up in Temple Fortune, north London, and had family members at Kinloss Synagogue in Finchley, according to Jewish News.
The 41-year-old and his wife, Chayala, celebrated the birth of their youngest child, a boy, two months ago.
The youngest victim has been named as 10-year-old Matilda, whose full name was not released. French national Dan Elkayam and former police officer Peter Meagher have also been named as victims of the attack.
Who were the attackers?
Mr Lanyon said the older of the two gunmen, named in reports as Sajid Akram, had a licence for six weapons and added that these were the guns found to have been used in the attack.
Akram’s son, Naveed Akram, 24, has been identified as the other attacker.
It was revealed on Monday the man was part of a gun club, but Mr Lanyon said on Monday police were still gathering information about the attackers.
Properties in the Campsie and Bonnyrigg areas of the city have been searched.
At a press conference, the commissioner said reports that a black Isis flag was draped over the attacker's car "would form part of the investigation".
He added that police were confident there was not a third person involved in the attack.
He earlier said that one of the offenders had been known to authorities but there had been no "specific threat".
What have witnesses described?
Lachlan Moran, 32, from Melbourne, told the Associated Press: "You heard a few pops, and I freaked out and ran away. I started sprinting. I just had that intuition. I sprinted as quickly as I could.
"Everyone just dropped all their possessions and everything and were running and people were crying and it was just horrible."
Finn, who did not give his surname, heard gunshots from the living room of his apartment near the beach.
He told ABC News at the scene: "I just hear a few fireworks going off, that's what it sounded like anyway.
"My parents were saying, 'take cover, take cover, take cover'.
"I didn't know what to do because obviously I was on my own.
"So, I was just in my apartment, in my wardrobe, for the best part of I would say an hour-and-a-half, just trying to see what was going on, trying to hear.
"I was so shaken up," he added.
How has the UK responded?
In a message to the people of Australia, the King said he was "appalled and saddened by the most dreadful antisemitic terrorist attack".
The Prime Minister is understood to have been in touch with his Australian counterpart Anthony Albanese.
Sir Keir Starmer said in a post on X: "Chanukah should be a time of celebration and joy.
"The news that the Bondi Beach attack was an antisemitic terrorist attack against Jewish families at a Chanukah event is sickening."
Foreign Secretary Yvette Cooper told any British people caught up in the shooting to contact the British consulate for support.
Police forces said they will put more officers into Jewish communities after the attack.
The Metropolitan Police will increase patrols around synagogues and other community venues, and Hertfordshire Constabulary said it would have a visible presence at key events in the county following the attack in Sydney, which left 12 people dead and 29 injured.
Police Scotland said it was already carrying out additional and dedicated patrols around synagogues and other Jewish venues and is "actively communicating with faith leaders" after the attack.
