OSLO, Norway — A lightning bolt struck 91 auto racing fans at a racetrack in Norway Sunday, and 45 people were taken to hospital with minor burns, police said.

The lightning hit a hill where spectators at the rallycross were sitting. Rallycross is a form of sprint-style automobile racing on a closed circuit. The race, a national championship, was called off after the incident.

Eng said 16 ambulances and three medical helicopters were brought to the scene at Flisa, about eight kilometers from the Swedish border.