A 17-year-old boy was rushed to hospital after he collapsed in front of a bus in Watford.
Police and paramedics raced to Pinner Road shortly before midday on Sunday following reports of a collision between a bus and a pedestrian.
The road was closed northbound for an hour while ambulance crews attended to the 17-year-old.
The boy, who was suffering a fit, was taken by road ambulance to Watford General Hospital.
He did not suffer any injuries from the bus.