The mother of Brisbane woman Sara Zelenak has confirmed the 21-year-old au pair was killed in the London Bridge terrorist attack.
Ms Zelenak, who moved to London in March, had been on the bridge with her friend Pri Gonçalves after leaving a restaurant when they heard a van crash. The pair stopped walking to see what had happened.
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London attacks: Australian families in mourning
The families of Kirsty Boden and Sara Zelenak are in mourning following confirmation of their deaths in the London Bridge terror attack.
Within moments, three men jumped from the van and began stabbing pedestrians in the first phase of an attack that would last nine minutes and claim seven lives. Dozens more people were injured - some critically - after the rampage on the bridge and in nearby Borough Market.
Ms Gonçalves told Fairfax Media she turned and ran, and, moments later, she looked back and realised Ms Zelenak was not behind her.
Ms Zelenak's mother, Julie Wallace, travelled to London to search for her daughter, after raising thousands of dollars through crowdfunding site GoFundMe.
Her husband, Mark, called every hospital in London to see if she had been admitted, but there was no trace of her.
On Wednesday afternoon, Mrs Wallace wrote on Facebook that her daughter had died in the attack, with her body identified by DNA.
"Our beautiful daughter Sara Zelenak has been confirmed dead," she wrote, including two photos of a smiling Sara at the airport with her brother, as she headed off for the trip of a lifetime.
"Sara was so excited about her European & UK adventure. This photo was the day she left, 10th March. Harrison and I cried on the way home.
"She missed us all & was so excited to catch up with us in Paris on the 30th of June for 5 days."
After meeting up with her family, Sara was due to go on a Contiki trip around Europe, before coming home on August 8.
"Unfortunately [this was] cut short by a senseless act of terrorism," Mrs Wallace said. "It makes no sense."
Sara's former high school, Moreton Bay College in Brisbane, wrote on Facebook that she had been "a positive, popular student who always had a smile on her face".
"She embodied the values of Moreton Bay College and was adored by her peers and staff," the school wrote. "This is how she will be forever remembered."
Ms Zelenak is the second Australian confirmed dead in the attack.
South Australian nurse Kirsty Boden, 28, was named as the first Australian victim.
She was also on London Bridge when the van hit pedestrians. She ran to help the first victims when she was fatally injured.
Ms Boden had worked at nearby Guy's Hospital, about 300 metres from where she was killed, since 2014 and was recently promoted.
In a statement released by the Metropolitan Police, her family said their "heroic" and "adored" daughter would never be forgotten.
"Helping people was what she loved to do in her job as a nurse and in her daily life," they said.
"As she ran towards danger, in an effort to help people on the bridge, Kirsty sadly lost her life. We are so proud of Kirsty's brave actions which demonstrate how selfless, caring and heroic she was, not only on that night, but throughout all of her life. Kirsty - we love you and we will miss you dearly."
Speaking to radio station 3AW on Wednesday, Prime Minister Malcolm Turnbull said he had been in contact with both women's families.
"You know, this is heart-rending," he said. "This is the last thing that anybody expects to happen to their children when they're in London. I mean, we are facing a global threat, this Islamist terrorism.
"It is a disease and it is corrupting, seeking to destroy from within the Islamic religion and of course, lashing out to destroy and undermine our way of life.
"We are heartbroken by these terrible crimes and this terrible loss. Talking to mothers who have lost their children is heartbreaking, but we must be resolute."
Five of the seven victims killed have been publicly identified. Dozens of people injured in the attack remain in hospitals across London.
Chrissy Archibald, 30, from the Canadian province of British Columbia, was the first victim to be named.
She was on London Bridge with her fiance, Tyler Ferguson, and died in his arms after being hit by the speeding van.
Her family said they grieved the loss of their "beautiful, loving daughter and sister", who volunteered at a homeless shelter and "would have had no understanding of the callous cruelty that caused her death".
"She had room in her heart for everyone and believed strongly that every person was to be valued and respected," her family said.
"Please honour her by making your community a better place."
James McMullan, 32, from east London, had been drinking at a pub with friends when he temporarily stepped out to get some air, just before the attack began.
Though he has not been formally identified, his family said his bank card was found on one of the bodies at the scene.
Mr McMullan's sister, Melissa McMullan, said: "No words can ever match his essence. There will only ever be one James.
"Nowhere else will you find such humour and unique personality - someone who puts his friends above all else."
Alexandre Pigeard, 27, from the French region of Normandy, was a waiter at the restaurant Boro Bistro and had lived in London for two years.
As he was working on the busy Saturday night, one of the attackers ran into the restaurant and stabbed him in the neck.
His family say Mr Pigeard was a "wonderful son", "a perfect big brother," and a "shining young man". His father described his death as an "incredible injustice".
with Megan Levy