Woman Suffering Stab Wounds Rescued From Car Boot After Driver Noticed Waving Hand

A woman with multiple stab wounds has been discovered in the boot of a vehicle in the New South Wales Southern Highlands after a motorist noticed a hand waving from the taillight area.

The truck driver who noticed the woman while driving on the Hume Highway called authorities around 11.30 am Wednesday (February 3).

The vehicle was later intercepted at Berrima by the Highway Patrol.

Police then discovered the 24-year-old woman in the boot, where she was treated at the scene before being rushed to Liverpool hospital to treat the multiple stab wounds.

While the woman had injuries to her knee, thigh and forearm, police say they were not life-threatening.

"Some excellent work done by the motorist that identified the hand coming out of the vehicle," Detective Chief Inspector Brendan Bernie said.

"It is very fortunate that we've found this lady alive, we obviously think that this could have ended quite catastrophically for her."

"It's very rare the police have intercepted it in progress and it's very lucky nobody was killed."

Two women inside the car, aged 18 and 24, were arrested over the incident but have not yet spoken to police.

"At this stage, it appears all the people involved are from the greater Sydney Metropolitan Area," Detective Chief Inspector Bernie added.

"Police are investigating how they came to be in the Southern Highlands," he said, adding they believe it was possible the victim had been in the boot since Wednesday morning, though he said it was too early to comment on possible charges or motives.