A teenage girl from Cambridgeshire has died after her scarf got caught in a go-kart and strangled her
It is claimed Suzanne Cornwell, 18, was one of a group of people invited to a racing track for a private after-hours session.
A member of staff is reported to have let the group in to the circuit.
As she drove a go-kart around the circuit, Suzanne's scarf came loose before getting caught in the engine and cutting off her airway.
Paramedics and police were called to Cambridgeshire Raceway in Caxton at 9.40pm on Thursday.
East of England Ambulance Service said the teenager had a "severe injury to her neck" and was unconscious when paramedics arrived.
Suzanne, from Hardwick, was rushed to Addenbrooke's Hospital in Cambridge, but died the next day.
A spokesman for Cambridgeshire Police told Sky News Online a joint investigation had been launched with South Cambridgeshire Council.
Cambridgeshire Raceway company secretary Phil Meakins told the Daily Mail that a track marshall had let a group of teenagers use the track after hours.
The marshall, who worked at the site for two years, has now been sacked, and Mr Meakins said the company was considering legal action against him.
Mr Meakins said: "All the other staff left at 8pm and I would have expected the marshall to have locked up at 9pm.
"But in this case he manually turned off the CCTV for the whole site, before letting his girlfriend and five friends onto the track."
Mr Meakin added that the racing track had been temporarily shut for "moral" reasons. The company's website has been temporarily closed down.
The mother of one of Suzanne's school friends described the teenager as an "absolutely gorgeous girl" who would be sorely missed.
Cambridgeshire Raceway, formerly known as Kartsport, was bought by the Peterborough Raceway company in July.
It has an indoor circuit as well as a 700 metre-long outdoor circuit, and is due to host the British Schools Karting Championship in January 2010.