IT IS believed a truck rollover that left two people injured and 11 head of cattle dead was the result of a failed overtaking attempt.
Emergency crews were called to the New England Hwy accident scene shortly after 1pm yesterday.
Crews arrived on the scene to find a Scofield's truck, which had been travelling north en route to the Grantham meatworks, had rolled just before the Turners Creek Rd turn-off.
Early investigations indicate the crash came after the truck tried to overtake a slower-moving sedan.
Sergeant Shane Gleeson from Stanthorpe police said it appeared the sedan sped up while the livestock carrier was overtaking, which lengthened the time the truck spent in the right-hand lane.
Sgt Gleeson said the driver of the truck then swerved back into the left lane when a truck came around the corner.
"After swerving back into the north-bound lane, the cattle inside the truck have lurched to one side causing the truck to roll," he said.
Of the 42 head of cattle on board, 11 either died on impact or had to be put down.
The male driver, who turns 23 today, has been given the all-clear from the paramedics while the female passenger was flown to the Toowoomba Hospital last night for observation.
Just minutes after the crash, Barry Byrne and Gary Patzwald from the Toowoomba Rural Fire Brigade drove past on their way home from a chainsaw training day in Stanthorpe.
They were able to lend their chainsaws and expertise to free the trapped livestock.
The 311 Lima Heavy Vehicle Rescue Crew from Toowoomba arrived on scene just after 3pm to set about correcting the rolled vehicle.
Sgt Gleeson said no charges had yet been laid over the crash.