THE B1200 at Manby Middlegate, near Manby Airfield, is currently closed after a woman was seriously injured in a crash involving a Vauxhall Tigra.
The incident occurred shortly after 2pm this afternoon.
A female passenger has been taken to hospital and Police are seeking a male from the vehicle and are appealing for anyone who saw a man in suspicious circumstances.
Diversions are currently in place to allow traffic to flow.
Anyone with information can call 101 to reach Lincolnshire Police.