Thieves stole a sat nav device after smashing the window of a vehicle parked in Spalding town centre at the weekend.
The Garmin sat nav was taken from a Volkswagen Caddy parked in Gore Lane car park after a policeman on patrol spotted the car with its window smashed.
Anyone who saw any suspicious activity in the area overnight on Saturday between 11pm and 5am should call police on 101, quoting incident number 28 of June 18th.