UPDATE JUNE 23: BUNDABERG Hospital has confirmed the three people involved in yesterday's single-vehicle smash are in their care.
An eight-year-old boy is in a stable condition with head and chest injuries.
A 24-year-old man is in a stable condition and is being observed for head injuries.
A woman is in a serious condition with head and chest injuries and is in intensive care.
EARLIER: A 28-YEAR-OLD woman is in a critical condition in Bundaberg Hospital after the car she was a passenger in slammed into a tree.
The male driver, believed to be in his 20s, and a boy about 10 were also being treated for injuries and were taken to hospital.
All three were travelling in a white Mitsubishi Lancer, which was extensively damaged, especially the rear section.
Emergency services rushed to the single-car crash in Enterprise St about 3.30pm on Wednesday and Queensland Ambulance Service Bundaberg acting officer-in-charge Michael Day said paramedics treated all three.
"We found on arrival that we had three patients, two males and a female," he said.
"We found that the female has got very serious injuries and the male patient is also in a serious condition with the little boy in a stable condition.
"All three patients have been transported to Bundaberg Hospital and will undergo further assessment."
Mr Day said he urged drivers to make sure they were taking due diligence on the road. "We always ask people to make sure they are obeying the law and slow down," he said.
"We just want to see everyone ensure that they arrive home safe to their families, so please be careful."
The Forensic Crash Unit is investigating and police confirmed they were looking into whether high speed or drug-driving was a factor in the crash.
"It would appear to be a fairly significant impact so the police investigations will determine whether or not there were incidents that caused the crash," Mr Day said.
EARLIER: POLICE and ambulance crews are rushing to a road traffic crash at the intersection of Enterprise St and Industrial Avenue.
It is believed to have been a single-vehicle smash.
The car was a white Mitsubishi sedan.
Two people are being treated at the scene, one is believed to be a child.
Update your news preferences and get the latest news delivered to your inbox.