A woman has been arrested on suspicion of causing death by careless driving after two men were killed in a car crash.
The woman was arrested by Lincolnshire Police after the car she was driving left the road and hit a tree.
Emergency services were called to the A15 bypass at Leasingham at about 2.50am today, where they found a Vauxhall Astra off the road.
Two passengers - a 37-year-old man from Waddington and a 23-year-old from Sleaford - were pronounced dead at the scene.
The driver was taken to Lincoln County Hospital with non-life threatening injuries, and is now helping police with inquiries.
The A15, which was closed for police investigations, has since reopened.
Separately, a 23-year-old man killed in a crash on Christmas Eve in Lincolnshire was today named by police as Christopher Edward Jones, of Water Lane, North Witham, near Grantham.
A blue Peugeot and a white Fiat were involved in the crash at about 5.30pm on Sleaford Road, Metheringham.
Mr Jones, who was driving the Peugeot, died a short while later. No one else was injured.
A spokesman for Lincolnshire Police said: "These deaths bring the total number of people killed on the county's roads this year to 39, compared to 46 this time last year."
The police have appealed for witnesses to either incident to come forward.