Police have closed roads in Mareham le Fen near Coningsby after a man in his 80s was hit by a van.
Emergency services were called to Fen Lane in the village after 2pm on Wednesday, December 19 following a report of a crash involving a pedestrian and a van.
The pedestrian, in his 80s, has been airlifted to hospital with serious injuries.
A Lincolnshire Police spokesperson said: “Roads are being closed in the area – including the A155 at Tumby roundabout – and we are advising people to avoid the area.
“If anyone witnessed this collision please contact officers via 101 quoting incident 203 of 19 December.”