Two people have died and two others have been seriously injured in a collision on the A15 near Cranwell shortly after 10am on Monday morning.
The deceased are the male driver of one car and a female passenger from the other vehicle.
All the casualties are local but no further details are being released at this time, police said.
Close relatives have been informed but wider family are still in the process of being contacted.
The Serious Collision Team are appealing for any witnesses who saw a green VW Golf travelling south along the A15 or a silver Astra travelling in the opposite direction prior to the collision.
Anyone with information should contact the Collision Witness Hotline on 01522 558855, quoting incident 112 of March 28.