Two children and a woman have been seriously injured following a horror crash involving two cars and a school bus. Emergency services were called to Campden Road, in Clifford Chambers, Stratford-upon-Avon, Warks., following the smash at 8.13am today (Tue). Paramedics found a double decker bus carrying school children which had been involved in a collision with two cars. Two boys and a woman from inside one car were found trapped with serious injuries and were freed from the wreckage with the help of fire crews. The boys were airlifted to Birmingham Children’s Hospital for treatment at a major trauma centre while the woman was taken to University Hospital Coventry and Warwickshire by ambulance. The bus driver and 30 school children managed to get off the bus and three children were described as 'walking wounded' with minor injuries West Midland Ambulance Service said two ambulances, two paramedic officers, the Warwickshire and Northamptonshire Air Ambulance and Midlands Air Ambulance attended the scene. A spokeswoman said: “When ambulance staff arrived, they found a double decker bus and two cars which had been involved in a serious collision. “Three occupants from one car, two boys and a woman, were trapped and upon assessment by ambulance staff were found to have sustained serious injuries. "The team of medics worked closely with fire colleagues to carefully extricate all three patients from the vehicle. "Each patient received trauma care to stabilise their conditions on scene before the two boys were airlifted to Birmingham Children’s Hospital. "The woman was taken by land ambulance on blue lights to University Hospital Coventry and Warwickshire. “The driver of the second car, a woman, was assessed on scene and found with minor injuries which didn’t require hospital treatment. “The bus driver and 30 school children were off the bus and safe and well seeking shelter in a nearby building. "Three children were described as walking wounded with minor injuries and were assessed by ambulance staff before being discharged on scene.”