Lincolnshire Police have confirmed that two men have died in the crash on the A1 at Colsterworth.
The men were killed in the crash between a car and curtain sided heavy goods vehicle on the northbound carriageway shortly before 1am on Wednesday, October 11.
Two people, a 41-year-old man and 36-year-old woman, who were travelling in the lorry were arrested on suspicion of causing death by dangerous driving.
They remain in custody.
Any witnesses should call police on 101, quoting incident number 16 of October 11.