South Australian nurse Kirsty Boden is believed to be the fourth Australian victim of the London Bridge terror attack and is feared dead, Fairfax Media has confirmed.
Channel Nine reported the family of the 28-year-old, who was living and working in London, were "very distressed" and had been provided with assistance.
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Fears for South Australian in London terror attack
There is mounting concern that 28-year-old Kirsty Boden was killed in the London terror attacks. Vision courtesy: Nine News.
Fairfax Media has confirmed Ms Boden's identity with a well-placed source who said authorities were almost certain she had been killed in Saturday night's terrorist attack.
South Australian Premier Jay Weatherill told Channel Nine: "We're putting in place all the appropriate measures to provide support for the families that were associated with this particular notification.
![South Australian nurse Kirsty Boden](http://web.archive.org./web/20170607213930im_/https://www.fairfaxstatic.com.au/content/dam/images/g/w/l/s/j/b/image.related.articleLeadwide.620x349.gwlhyg.png/1496759589823.jpg)
"It's a matter for [the Department of Foreign Affairs and Trade] to confirm the matter and to identify the particular Australian citizen that we're gravely concerned about."
Fairfax Media has contacted DFAT and the office of Foreign Minister Julie Bishop.
Ms Boden and her family are understood to be from the town of Loxton on the Murray River north-east of Adelaide.
A keen traveller, she ran a blog in which she identified herself as a 28-year-old Australian living in London and working full-time in the healthcare sector.
![Kirsty Boden (right) The South Australian woman feared to be dead after the London attacks.](http://web.archive.org./web/20170607213930im_/https://www.fairfaxstatic.com.au/content/dam/images/g/w/l/q/h/z/image.related.articleLeadwide.620x349.gwlhyg.png/1496759589823.jpg)
She described herself as "just your average dreamer, with a full-time job and a constant longing to go where I haven't been".
Recent posts detailed her travels in Milan, Sofia and Lisbon, and a trip to Kiev, Ukraine for the 2017 Eurovision song contest.
![South Australian nurse Kirsty Boden.](http://web.archive.org./web/20170607213930im_/https://www.fairfaxstatic.com.au/content/dam/images/g/w/l/s/h/h/image.related.articleLeadNarrow.300x0.gwlhyg.png/1496759589823.jpg)
"I recognise that I might not go everywhere but I should definitely go everywhere I can, and so should you!" Ms Boden wrote.
"At risk of sounding cliche, life is short and we should all use the time we have wisely."
Before moving to London in 2013, it is understood she spent some time in Sydney where she worked as a registered nurse and a volunteer lifesaver at Tamarama Beach.
Mystery still surrounds the circumstances of another Australian, Brisbane au pair Sara Zelenak, also feared to have been caught up in Saturday night's terrorist attack, which killed seven people.
Her mother Julie Wallace was travelling to London on Tuesday to find her daughter, who was last seen by her friend Pri Gonçalves when fleeing the scene of the attack.
"I have to go and do something, I have to go over there," Ms Wallace told a Brisbane radio station. "My husband and my boys are insanely distraught. I have to stay strong for them because that's what I have to do."
Ms Gonçalves earlier told Fairfax Media she was separated from Ms Zelenak as they desperately ran away from London Bridge.
"I ran thinking she would be running with me but I looked back and she wasn't there," she said. "I thought I was going to die, it was by far the most traumatising, shocking and scariest moment of my life."
On Tuesday morning, Prime Minister Malcolm Turnbull said Australia maintained "real concerns" about two missing Australians, including Ms Zelenak.
"We are working diligently in London with the police and other authorities there and of course, staying in very close contact with their families as we seek to confirm the circumstances relating to those two Australians," he said.
London Metropolitan Police said it was working with the coroner to identify the deceased victims and had dispatched family liaison officers to work with their families.
A Met spokeswoman told Fairfax Media on Tuesday afternoon: "There is a process that we need to go through and given the circumstances we need to go through that process. We won't be commenting any further than that."