– It's an A-tractor that, according to witnesses, drove at a higher speed than allowed. It has gone off the road, lost control, and then flipped over, says Göran Karlbom, officer on duty at the West police region.
One of the boys is seriously injured and has been taken to hospital by ambulance helicopter.
The incident is being investigated as reckless driving, causing bodily harm, and unauthorized driving, with the driver of the vehicle as a suspect.
The vehicle has been seized for technical examination.
The incident occurred at around 19:00 on Thursday.
