Passengers in a passing plane got a shock when they looked out the window.

A plane has flipped on its head during landing on French island, south-east of Melbourne, injuring a man in his sixties.

The plane took off from nearby Toorabin Airport on Saturday afternoon and was in the air for nine minutes before it landed and flipped on French Island just before 2:30pm.

A man in his sixties was injured in the incident, suffering cuts to his legs, but he remains in a stable condition and has been flown to the Royal Melbourne Hospital.

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One other passenger and the pilot were on board, but Victoria Ambulance has not reported any further injuries from the accident.

Authorities are still investigating how the plane flipped. Victoria Police told 9News the "exact cause is not known at this stage", but early investigations suggest that a landing gear in the undercarriage collapsed.

The Australian Transport Safety Bureau will conduct a full investigation into how the incident occurred.

Prime Minister Anthony Albanese has met with billionaire Microsoft founder Bill Gates at his official residence.

The pair met at Kirribilli House in Sydney on Saturday morning to discuss sustainable energy, health and climate change.

Albanese used the opportunity to discuss the global energy transition with Gates, who founded Breakthrough Energy, a company that aims to improve sustainable energy options and reduce greenhouse gas emissions.

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Before the meeting, the also duo highlighted the need for better future pandemic planning.

"I've admired your work and your contribution, not just financially, but in raising debates, including the need to deal with health issues," Albanese said.

"We've just been through the pandemic, but we need to prepare for future health challenges.

"The work that's being done on eradicating malaria and other diseases in our region is very important."

"As you say, the preparedness for the next pandemic is still a discussion that hasn't been figured out," Gates said.

"You know, malaria in the long run, we want to do the same thing we're doing with polio, which is eradicated regionally, and then eradicated all over the world."

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In 2015, Gates famously predicted that the world wasn't prepared for a pandemic in a TEDTalk, years before COVID-19 hit, and has long campaigned to eradicate malaria.

The Gates Foundation, which has spent $USD53.8 billion since 2000, has the goal of creating a world free from the deadly disease.

The US Treasury Department will designate the Russian mercenary organisation Wagner Group as a "transnational criminal organisation" and will impose additional sanctions next week against the group and its support network across the world, the White House said on Friday.

"These actions recognize the transcontinental threat that Wagner poses, including through its ongoing pattern of serious criminal activity," National Security Council Coordinator for Strategic Communications John Kirby told reporters on Friday, ahead of the Treasury Department announcement.

Along with the new sanctions, the US has released newly declassified photos of Russian railcars travelling from Russia to North Korea and back in November, in what the US believes was the initial delivery of infantry rockets and missiles for use by the mercenary organisation Wagner Group in Ukraine.

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Kirby said that while the US does not believe the equipment has changed the battlefield dynamics in Ukraine, the US expects those kinds of weapons systems deliveries from North Korea to Russia to continue. Russia has also been receiving equipment, including drones, from Iran, as its military supplies have dwindled over the course of the war.

"The arms transfers from [North Korea] are in direct violation of United Nations Security Council resolution," Kirby said, adding that the US has shared its intelligence with the Security Council's DPRK sanctions committee panel of experts.

A senior western intelligence official echoed that assessment on Friday, telling reporters that the West is "certainly concerned that North Korea might plan to expand and deliver more military equipment or to sustain those deliveries."

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Tensions between Russian military and mercenary group

More broadly, the US assesses that tensions between the Russian Defence Ministry and Wagner are increasing as Russian President Vladimir Putin increasingly relies on Wagner to carry out operations in Ukraine. There are around 50,000 Wagner Group fighters currently deployed to Ukraine, according to Kirby, including 10,000 contractors and 40,000 convicts.

"Wagner is becoming a rival power centre to the Russian military and other Russian ministries," Kirby said, and the US has intelligence suggesting that the Russian Defence Ministry "has reservations" about Wagner's heavy recruitment from Russian prisons.

Yevgeny Prigozhin, the head of Wagner Group, has complained that the Russian Ministry of Defence has botched the war effort, and that Wagner fighters should be given more equipment, authority and autonomy to carry out operations in Ukraine.

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A senior US official told CNN last month that the Wagner Group has lost thousands of fighters in Ukraine in the last two months alone, most heavily in its operations around Bakhmut in eastern Ukraine. But they have also proven more effective than the Russian military in some areas, Pentagon officials have said.

Tensions between Kremlin defence officials and Wagner Group leaders have also been rising amid public complaints by the mercenaries that they are running low on equipment and reports that their leader, Prigozhin, wants to take control of the lucrative salt mines near Bakhmut.

In a video that ran on Russian state media, Wagner Group fighters complain that they are running low on combat vehicles, artillery shells and ammunition, which is limiting their ability to conquer Bakhmut – shortages Prigozhin then blames on "internal bureaucracy and corruption".

The US believes that Prigozhin's open defiance of the Russian Defence Ministry is an attempt to generate positive publicity for himself.

"Prigozhin is trying to advance his own interests in Ukraine," Kirby said on Friday.

"And Wagner is making military decisions based largely on what will generate positive publicity for Prigozhin."

The latest incident comes amid a horror nine days in the water for Kiwis.

Get ready for a major political reset once Chris Hipkins is sworn in as PM this week

The 3.2m long great white shark was tagged on Monday.

The road was closed so police could clear a crash which injured two people.

“Because all of us, everybody in Whanganui, suffer because of inadequate housing.”

Matthew Wielenga is accused of a conspiracy involving 170kg of a substance designed in NZ.