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Australia news live: three dead and man arrested in Sydney; Liberals claim seat of Nepean in key Victorian byelection | Australia news

Three dead and man in custody in Sydney
A third victim has died and a man is in police custody after an incident at a home in Sydney’s south-west, AAP reports.
NSW police arrived at the house in Rosemeadow on Sunday at 1.30am after reports of a disturbance.
Officers found a 64-year-old man suffering serious head injuries, along with the bodies of a woman in her 60s and a man in his 20s.
The injured man received medical treatment from NSW ambulance paramedics and Liverpool hospital, but later died.
The bodies are yet to be formally identified.
Police say the victims “were assaulted by a man known to them”. It was being treated as an alleged domestic violence incident.
Police arrested a 32-year-old man, who was taken to Campbelltown police station for questioning.
Officers have set up a crime scene and are preparing a report for the coroner.
Key events
Sarah Basford Canales
Something has changed in Australia. The voters of Farrer may tell us what, and how much
This Saturday’s federal byelection in Farrer is set to be an unorthodox political battle. Neither of the two front-runners for the seat in south-western NSW, which was held by Sussan Ley, is from one of the major parties.
Read Guardian Australia’s Sarah Basford Canales profile of One Nation candidate David Farley here:

Josh Taylor
Under a cloud: the growing resentment against massive datacentres
When West Footscray resident Sean Brown takes his 19-month-old boy to the park, their walk passes an imposing new building cheerily spruiked as “Australia’s largest hyperscale AI factory”, a datacentre called M3.
He hates it: the construction noise from its constant expansion, the looming towers and the insistent background hum, the exhaust from the growing array of diesel generators that power the ranks of servers inside.
And he worries what it represents for his young child’s future.
Guardian Australia’s Josh Taylor spoke to residents living near datacentres in three states about their concerns, which are emblematic of the growing opposition to these developments across the country.
Read more here:
Liberals claim seat of Nepean in key Victorian byelection
The Liberal party has claimed victory in a key Victorian byelection seen as a preview of what to expect when the rest of the state hits the polls in November.
As counting continued in the Mornington peninsula seat of Nepean, the Liberal candidate, Anthony Marsh, appeared to be in a commanding position, in a significant boost to opposition leader Jess Wilson.
With close to 80% of the vote counted, Marsh had 38.5% of the primary vote, and 63.4% on a two-candidate basis.
Read more from AAP here:
Three dead and man in custody in Sydney
A third victim has died and a man is in police custody after an incident at a home in Sydney’s south-west, AAP reports.
NSW police arrived at the house in Rosemeadow on Sunday at 1.30am after reports of a disturbance.
Officers found a 64-year-old man suffering serious head injuries, along with the bodies of a woman in her 60s and a man in his 20s.
The injured man received medical treatment from NSW ambulance paramedics and Liverpool hospital, but later died.
The bodies are yet to be formally identified.
Police say the victims “were assaulted by a man known to them”. It was being treated as an alleged domestic violence incident.
Police arrested a 32-year-old man, who was taken to Campbelltown police station for questioning.
Officers have set up a crime scene and are preparing a report for the coroner.
Good morning
And welcome to another Sunday Guardian live blog.
This morning, Nationals leader Matt Canavan will be appearing as a guest on ABC Insiders.
In Victoria, state opposition leader Jess Wilson claimed victory for the Liberal party in a key byelection in the seat of Nepean, ahead of a state election in November.
This morning in Sydney, there will be a paddle-out across the harbour in support of the Global Sumud Flotilla, which included six Australians, and was intercepted by Israeli defence forces while attempting to deliver aid to Gaza.
And Japanese prime minister, Sanae Takaichi, is expected to arrive in Australia tonight, in her first official visit since taking office. She will meet with the prime minister, Anthony Albanese, in Canberra tomorrow for the Australia–Japan Annual Leaders’ Meeting.
I’m Petra Stock and I’ll be taking the blog through the day.











