Police are appealing for witnesses who saw a ‘motoring incident’ in Low Fulney, near Spalding.
It is after two cars travelling in opposite directions came to a stop near the junction of Rangells Gate and Kellet Gate.
It happened at around 7.45pm on Sunday, April 27.
A police spokesperson said further details on what happened after the cars stopped can't be given for operational reasons.
However they are appealing for witnesses who may have seen the two cars stop.
One of the vehicles involved is described as a silver coloured Jaguar and the other a yellow VW Beetle.
Anyone who was in the area at the time or saw the two cars can call police in Spalding on the 101 non-emergency number.