Police are appealing for witnesses after claims that a driver was intimidated by two other motorists driving erratically on a Lincolnshire A road.
The intimidation is alleged to have taken place on the A18 at Gunness, heading towards Scunthorpe, between 8.20pm and 8.40pm on Sunday, August 28.
The victim, who was driving a red Vauxhall Corsa, claims to have been followed by a silver Nissan Terrano and black Vauxhall Vectra.
Investigating officers are asking independent witnesses to come forward.
Anyone with information, or who believes they may have seen any of the vehicles involved at around this time, is asked to call Humberside Police on 101, quoting log number 556.