Police are re-appealing for information following an incident in Cedar Road, Kettering, where two girls were approached by an unknown woman.
The two girls, both aged 11, were approached by the woman, who told them their mother had sent her to pick them up.
Knowing this not to be true and not recognising the woman, the girls did not speak to her and went into a nearby shop.
The woman, who was driving a dark green Vauxhall Zafira (pictured), was alone in the car when she approached the girls.
A teenage girl was seen to get into the car a short time later and it is believed she had been to the nearby Londis store and knew the driver.
Police are keen to establish the circumstances surrounding the incident, which happened on Thursday, July 2, between 5.15pm and 5.45pm, and are urging both the driver of the car and the passenger to contact them as soon as possible.
The driver was a white woman, in her mid-thirties, with long brown, chest-length hair.
She wore a plain black t-shirt, light blue jeans and brown boots.
She also had a dark blue lanyard around her neck.
The passenger is described as white, in her early teens, with light brown hair which was tied up.
She wore a white short sleeved t-shirt, skinny blue jeans and back trainers with white laces and soles.
She was also wearing a back-pack.
Witnesses, or anyone with information, is asked to contact Corby CID on 101, quoting incident number 528 of July 2.
Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 555 111 or use the anonymous online form at www.crimestoppers-uk.org.