A man and a woman are being treated for serious injuries after a crash between a car and a HGV lorry on the A17 south east of Lincoln.
The collision at East Heckington took place at around 3.25pm on Wednesday, June 10.
The section of the A17 has been closed in both directions and police are predicting that it will remain closed for “several hours”.
Motorists are being told to follow diversions.
Any witnesses to the collision are being asked to contact Lincolnshire Police on 101 quoting incident number 262 of June 10.