A man has been arrested following an incident at Brands Hatch last weekend involving a Volkswagen Polo road car being driven onto the track during a club race.
The 21-year-old, from Tonbridge in Kent, was taken into police custody on Monday on suspicion of false imprisonment.
It follows an incident on Saturday when the private car was driven onto the Brands Indy circuit towards the end of a four-hour Fun Cup race.
A video filmed by a passenger in the back of the car showed the Polo accessing the circuit from the pitlane, having been driven through the main paddock and then a garage.
The driver, who appears to ignore pleas to stop by the person in his passenger seat, drove around the entire Indy circuit but returned to the pits before completing a lap.
VIDEO: BRANDS HATCH ROAD CAR INCIDENT
The race was red-flagged and an inquiry into the incident has been launched between Kent Police, the Motor Sports Association and circuit operator MotorSport Vision. The British Racing and Sports Car Club, which organised the meeting at the weekend, said it was assisting all parties.
MSV boss Jonathan Palmer told AUTOSPORT: "I'm absolutely seething at this complete madness. It was deliberate and endangered competitors and his passengers.
"It's a completely unprecedented occurrence, an opportunity to get a bit of notoriety.
"We're co-operating already with Kent Police. It's very important the law takes a strong stance to make it clear it's not acceptable."
An MSA statement read: "The Motor Sports Association is extremely concerned by the events that occurred at Brands Hatch at the weekend.
"As the governing body, the MSA condemns in the strongest possible manner the irresponsible actions of these individuals, and is pleased that Kent Police shares its view of the gravity of the incident.
"In the meantime, the MSA has announced an inquiry to understand fully the circumstances of the incident.
"As part of these investigations, the MSA will be liaising with AMRCO [the Association of Motor Racing Circuit Owners] and the organising clubs to seek their views and to ensure that all reasonable measures are taken to prevent similar occurrences in the future."