Lincolnshire Police are investigating and offering reassurance to members of the public in the Lincoln village of Nocton after a young girl was approached.
The nine-year old girl was approached by a person on Main Street just after 3.30pm on December 4.
A Lincolnshire Police spokesperson said: “It is not yet clear whether the incident reported involved a man or woman.
“It was reported to police and an enquiry was immediately launched.
“Officers attended the scene and spoke to the girl involved, and a number of enquiries are ongoing.”
Police officers attended local schools on Friday, December 5 and letters have been sent home to parents notifying them of the investigation.
There will be extra police presence in the area over the next few days.
Anyone who was in the area at the time, who may have information, is being asked to contact Lincolnshire Police on 101, quoting incident number 281.