The A17 has been closed in both directions and an air ambulance called after a crash this afternoon.
Emergency services were dispatched to the two-vehicle crash east of Sleaford near the village of Kirkby la Thorpe at around 2.45pm on Tuesday, September 5.
A spokesperson for Lincolnshire Police confirmed that there were injuries.
However, the severity is not yet known.
Motorists should avoid the area and follow diversions.