4pm UPDATE
A teenager was trapped in his vehicle after this afternoon's accident at Capalaba, the Queensland Ambulance Service has revealed.
Emergency services cut the car open to free the man, after the vehicle car collided with a mini-bus carrying 15-20 tourists on Mount Cotton Road.
Paramedics, including a high acuity response unit were called to the scene.
Senior operations supervisor Steven Clarke said speed was probably not a factor in the crash.
He urged drivers to be careful on busy roads.
A forensic crash unit will investigate the incident.
EARLIER
Four people have been hospitalised after a serious accident at Capalaba this afternoon.
The accident happened when a bus and car collided on Mount Cotton Rd.
A young male was taken to Princess Alexandra Hospital in a critical condition. A critical care paramedic and high acuity response unit were on board.
A further two patients - a male and a female in their 50s - were transported to Redland Hospital with minor injuries.
A fourth patient was also taken to Redland Hospital in a stable condition.
A Queensland Ambulance Service spokeswoman said she was unable to confirm the gender of the fourth patient.
Paramedics were called to the scene at 1.15pm.
More to come