A young boy thrown from a carnival ride in Victoria has been identified as the son of one of the ride operator's staff.
The boy is fighting for life after the horror accident in Rye on Monday night, which saw him flung from the fast-moving ride.
It's believed the Cha Cha ride at a carnival in Rye, on the Mornington Peninsula, may have been operating after hours and investigators are looking into whether the child was tall enough to be on it.
The boy was airlifted to the Royal Children's Hospital with serious head and hand injuries after coming off it about 5pm on Monday.
He remains in a critical condition, a hospital spokeswoman said on Tuesday.
Ride operator Wittingslow Amusements says its priority is the family of the young boy.
"The injured boy is a son of one of our staff members and is now in the care of the Royal Children's Hospital," the company said in statement on Tuesday night.
"This has been a distressing situation for our small carnival community."
A parent who was on the ride with their two children told Fairfax Media it lasted about five minutes before the boy was flung out.
"The attendant announced it was the last ride of the day for the Cha Cha and there appeared to be a number of carnival workers and relatives of workers on the ride," the parent said.
WorkSafe says its investigation will focus on the ride's height requirements and if all safety procedures had been followed.
"Initial inquiries indicate that the ride may have been used by carnival workers and their families after the carnival had closed," WorkSafe Victoria said in a statement on Tuesday.
"WorkSafe was at the scene last night and issued a notice to ensure the scene was not disturbed so investigations could continue today."
In a similar accident in 2011, Brittany Clemente was flung from a Cha Cha ride in Lilydale and the 13-year-old has been left with ongoing injuries.
"It just got to a point where she just couldn't hold on, so she was flung from one side of the ride to the other and hit a fence," her mother Silvana Clemente told AAP on Tuesday.
Brittany still suffers from migraines, anxiety and pain in her wrist that will likely never subside.
In 2014, eight-year-old Adelene Leong died after being thrown from a high-speed ride at the Royal Adelaide Show.
© AAP 2017