Detectives investigating Madeleine McCann are trying to trace a girl who was photographed in Sweden, after computer-matching showed she could be the missing youngster.
The blonde girl was pictured at a car show in Stockhom and bears a strong resemblance to Maddie.
Swedish police have been inundated with calls from the public, after the snap appeared on a website.
They also received a spate of calls from visitors who believed they had seen Maddie, who would now be six years old, at the car show in August 2009.
The girl was with a Swedish man and a woman and spoke perfect English.
Madeleine's parents, Dr Gerry McCann, 40, and his Liverpool-born wife Kate, have now asked for an urgent investigation after face-mapping technology used by British police identified the girl as a possible match.
Investigators studying the internet photo claim her jawline is identical and her eyes are the same colour as Maddie's.
But the snap is not clear enough to show Madeleine's distinctive characteristic mark in her right eye.
The McCann's official spokesman Clarence Mitchell said: "Kate and Gerry and their investigators are aware of the picture and are liaising with the relevant authorities.
"The investigation team are looking into it."
Maddie disappeared from the family's holiday villa in Praia da Luz on Portugal's Algarve coast in May 2007, at the age of three.
Beomene, Sweden around 2 months ago