A young girl and her grandmother have died, and her sister is fighting for her life, after a crash south of Port Macquarie, police say.
Jane Garay, 75, was driving north on Coomba Road, Whoota, near Forster in a Daihatsu Sirion when the car left the road and crashed into a tree about 2pm yesterday, police said.
Tabitha Garay, 10, died and Madelyn Garay, 12, was critically hurt with severe internal injuries, Inspector Tony Power of Manning/Great Lakes Local Area Command said.
Madelyn was flown to John Hunter Hospital in Newcastle for surgery and remains in a critical condition in the intensive care unit, Inspector Power said.
Her grandmother, from Cammeray on Sydney's north shore, was also taken to the hospital but later died, police added.
Inspector Power said police, with the assistance of the Port Macquarie Crash Investigation Unit, were trying to find out why the crash happened.
He said investigators believe the sisters, from Baulkham Hills in north-west Sydney, were visiting a holiday home with their grandmother during the school break.
A report will be prepared for the coroner.
Police urged witnesses to phone Crime Stoppers on 1800 333 000.