UPDATE: Two drivers badly hurt in collision which blocked A17 between Sleaford and Heckington
A spokesman stated today (Monday): "A driver of a white van and a driver of a blue MG were both seriously injured and taken to hospital for treatment.
"The road was closed and fully re-opened at 4pm."
A witness said at the time that she could see at least one car badly damaged.
She said: "The road is blocked just past the Kirkby La Thorpe turning and police are turning drivers back, but there are already lengthy tailbacks in both direction registering on AA traffic news.
The A17 was closed between the A153 turn off for Ruskington and the Heckington bypass, with diverted drivers congesting roads through Howell and Ewerby in an effort to go round.