The body of a woman has been found in Australian bushland, following an eight-day search for a Sydney teenager reported missing last Wednesday.

Police said that while the body was yet to be formally identified, it was believed to be that of 18-year-old Lily Hooper. The confirmation came after local media reported that she had been found alive.

The teenager left her home in Sydney to go walking in a nearby national park on 12 August. Her family reported her missing later that night, after she failed to return home by 10pm.

Her car was found in a car park at the bottom of a challenging trail in the Nattai National Park.

Police said that the woman’s body was found in the Southern Highlands at approximately 11:30 local time on Thursday.

There was initial confusion as to Hooper’s condition, after New South Wales Premier Chris Minns told a parliamentary hearing that she had been found alive. Local media suggested that her family had also been informed that she was alive.

Minns corrected himself shortly afterwards, and told the hearing that “Lily’s body has been found” and she was deceased.

“This is obviously devastating, and I’m profoundly sad for her family and for all those concerned,” said Minns, and apologised to the committee.

A multi-agency search for the missing bushwalker had taken place over the past week, with support from multiple NSW Police Force units including PolAir, the Rescue Unit, the Trail Bike Unit, the Mounted Unit and the Dog Unit.

Police have also been supported by the Rural Fire Service, the National Parks and Wildlife Service and almost 100 members of the Australian Defence Force.

Australian Prime Minister Anthony Albanese later paid tribute to the 18-year-old in parliament, calling Hooper’s death an unspeakable tragedy.

“Lily Hooper had so much more to offer the world. Her passing, I have no doubt, will be felt very deeply,” he said.

Opposition leader Angus Taylor, Hooper’s local MP, said the initial incorrect reports that Hooper had been found alive made the family’s loss even worse.

“We can only imagine what Lily’s family is going through right now. Such news would be a nightmare for any parent, and we grieve for Lily’s wider family,” Taylor said.