A man in his 20s has died after two bikes crashed at the motocross circuit near Grantham.
Two men in their 20s were seriously injured in the crash at the Moto 101 course near Bees Gorse in Gonerby Moor at 12.34pm on Sunday, June 2.
One of the men did not survive his injuries. Police said family members have been informed.
Lincolnshire Police are investigating the circumstances of the incident and are aware that there may be footage of the collision.
South Kesteven District Council will be carrying out a health and safety investigation.
Lincolnshire Police said: “A number of riders may have obtained Go-Pro footage, and spectators may have left the scene with mobile phone recordings.”
Moto 101 posted a statement on social media: “On Sunday, June 2 a fatality occurred at Moto 101.
“If any other riders or spectators that were at the track have any video evidence e.g GoPro footage or from spectators viewing bank please can you get in touch..
“Our sincerest condolences go out to the family and friends of those involved and with the upmost respect we will be closed this week.
“All we ask is please can you all respect the family and friends of those involved at this very sad time!”
Anyone with footage of the incident should contact police on 101 quoting incident 209 of June 2.