A 73-year-old woman has died from her injuries following a collision at Fonaby Top, Caistor, on Sunday afternoon (August 21).
The woman, from North Lincolnshire, was one of four people who sustained serious injuries following the collision between a white Ford Focus and an orange Kia Sportage.
One other person received minor injuries.
The casualties were taken to Hull and Grimsby Hospitals, and one person was able to attend a hospital without assistance.
Ewan Gell, Senior Investigating Officer, said: “If you were at this location at 4pm and saw either the white Ford travelling towards Caistor from the direction of Humberside Airport, or the orange Kia heading towards Brocklesbury, please call us on 101 quoting incident number 276 of the August 21.”