An 18-year-old woman was strangled by her scarf when it became entangled in a kart at an indoor circuit in Cambridgeshire, the BBC has learned.
Suzanne Cornwell was at the Cambridgeshire Raceway in Caxton when the incident happened last Thursday.
It is believed Miss Cornwell, from Hardwick, Cambridgeshire, was at the race track after normal opening hours.
Police and South Cambridgeshire District Council are investigating the death.
The East of England Ambulance Service said the teenager had suffered "critical" neck injuries and was unconscious when paramedics arrived.
Miss Cornwell was taken to Addenbrooke's Hospital in Cambridge but died the next day.
A Cambridgeshire Police spokesman said: "Police and South Cambridgeshire District Council are jointly investigating an incident which resulted in the death of an 18-year-old woman last week."
A post-mortem examination took place earlier.
The race track was closed until further notice "due to circumstances" according to the company website.