A man and a woman died and another female was seriously injured after a crash on the A156 at Gate Burton north west of Lincoln on Thursday.
The incident, involving a white BMW M5 and a silver Vauxhall Astra, happened near the junction with Clay Lane at around 5pm on December 5 and the road was closed for several hours while emergency services attended.
A man in his 40s, who was driving the Astra, and a passenger in the same vehicle, a woman in her 30s, were pronounced dead at the scene.
A woman in her 50s, who was driving the BMW, was seriously injured and taken to hospital.
Lincolnshire Police are appealing for witnesses and anyone with information, or who captured dashcam footage, should contact them on 101 or via email at [email protected] quoting incident 336 of December 5.
It can also be reported through the independent charity Crimestoppers anonymously on 0800 555 111.