Lincolnshire Police have warned that they are attending a crash involving a lorry, van and a car on the A46 north of Lincoln.
The collision happened at around 12.15pm at North Faldingworth.
Police have said there are believed to have been injures following the crash and they have enforced road closures in the area.
Motorists are being advised to avoid the A46 at Faldingworth.
Anyone who witnessed the crash is being asked to call the force on 101.