Two men in a white van asked a 17 year old girl to get into their vehicle in Deeping St James last night.
The incident took place at around 7pm in Thackers Way and the girl refused and left the area.
Lincolnshire Police say this incident follows a number of similar incidents in the Deepings area in the last week.
Investigations are ongoing and extra officers are being drafted into the area at key times.
Officers are urging parents not to panic, but to be vigilant and to give their children the usual common sense stranger danger advice.
Anyone with any information on these incidents is asked to call 101.