Scott Morrison has said coronavirus may have been made deliberately in a Chinese lab.
The Prime Minister said the theory, which is being investigated by US spies, 'can't be ruled out' even though he has seen no evidence to support it.
'There's nothing that we have that would suggest that that is the likely source but you can't rule anything out in this scenario,' he said today.
Scott Morrison has said coronavirus may have been made deliberately in a Chinese lab. Pictured: The Wuhan Institute of Virology
Customers walk past pork stalls at the Dancun Market in Nanning, Guangxi province, China. The leading theory is that coronavirus jumped from animals to humans in a wet market
Mr Morrison confirmed he will back European Union resolution to set up an investigation into the outbreak.
'We know it started in China, in Wuhan, and the most likely scenario that has been canvassed relates to wildlife wet markets,' he said.
'This is one of the reasons why it is important we have an objective, independent assessment of how this originated and learn the lessons of how this occured.'
The resolution will be put to the World Health Assembly which meets in Geneva, Switzerland on 18 May.
On Thursday US President Donald Trump speculated that China could have unleashed the coronavirus on the world by mistake and even suggested that the release could have been intentional.
An aerial view shows the P4 laboratory at the Wuhan Institute of Virology in Wuhan
Vendors wearing face masks as they offer prawns for sale at a market in Wuhan where reports of the virus first emerged in December
His intelligence agencies said they are still examining a notion put forward by the president and aides that the pandemic may have resulted from an accident at the Wuhan Institute of Virology.
The lab is a few kilometres from the city's wet markets and was researching coronaviruses including the SARS virus, a close genetic relative of the current virus.sonos sonos One (Gen 2) - Voice Controlled Smart Speaker with