UPDATE
A young man was rushed to St George Hospital in a critical but stable condition after his boat collided with a jetski on the Georges River at Illawong on Saturday morning.
Matt Rowe, 21, was driving the boat with his 24-year-old brother, who was also hurt in the crash was treated for minor injuries before be released by paramedics.
The 45-year-old male jetski rider suffered serious back and hand injuries and was also taken to St George Hospital.
EARLIER
A man has been rushed to hospital in a critical condition after a boat crash at Illawong involving a jetski.
Emergency services, including two rescue helicopters, were called to the Georges River following reports a boat and jetski had collided about 9.30am on Saturday.
A 21-year-old man, who was in the boat, was treated at the scene and stabilised before being taken to St George Hospital. He is in a critical condition, a hospital spokesperson said, and is scheduled for surgery after which he will be transferred to intensive care.
A 24-year-old male suffered minor injuries and was expected to be discharged from hospital shortly.
Sutherland police are at the scene and an investigation is underway by officers from the Marine Area Command.