A man has been killed following a very serious collision on the B1191 at Thornton, near Woodhall Spa.
The collision, which occurred at 2.15pm, involved a tractor and a motorcycle.
The victim is male and local but police are not confirming age until all family members have been made aware.
The victim was the motorcyclist. The driver of the tractor suffered shock but was uninjured.
Any motorists who were using the road at the time of the collision, who have not spoken to officers at the scene, are asked to call 101, quoting incident number 229 of 4th May.