UPDATE: A man in his late 40s has been hospitalised after a three-car crash on the Sunshine Mwy.
Eastbound traffic past the Sippy Downs scene was reduced to one lane and stopped while tow truck drivers retrieved the stricken vehicles.
Drivers queued back towards the Bruce Hwy and tried to avoid the scene by taking the Dixon Rd exit.
A Queensland Ambulance Service spokeswoman said the injured man was in a stable condition suffering from back pain when he was taken to Nambour General Hospital.
Paramedics assessed another adult as well as some children at the scene but they did not require hospitalisation.
The eastbound lanes of the motorway were reopened to traffic at 4.51pm.
EARLIER: Paramedics are treating two adults and two children at the scene of a three vehicle crash on the Sunshine Mwy.
Emergency services were called to the Sippy Downs scene, near the Kawana Way off-ramp, at 3.44pm on Wednesday.
A Queensland Ambulance Service spokeswoman said the patients were being assessed by paramedics.
Traffic is flowing in the westbound lane. One lane has just been reopened for eastbound traffic.