Madeleine went missing while on a family holiday to the Algarve in Portugal in 2007.
The tourists were so convinced it was Madeleine, who would now be eight years old, that they tried to take the girl away from the Belgian man and French woman who insist they are the child's parents.
Madeleine was a few days from her fourth birthday when she went missing. She would be eight now.
Police have taken swabs from the youngster so that a DNA test can be carried out and a team of private investigators working on behalf of Kate and Gerry McCann are in contact with them.
It has also been reported that the passports of the girl's family have been confiscated by the Indian authorities until the results of the DNA test have come back.
A spokesman for Leh police said: "It all depends upon the evidence like DNA for which help from Madeleine's parents and the British police was required."
"We are liaising with the Indian authorities over the incident and await the results of the DNA test."
Gerry and Kate McCann recently launched a book about how their daughter disappeared with proceeds from the book, entitled Madeleine, going towards the funding of their search for their daughter.
Despite a massive police investigation and huge publicity worldwide, she has not been found.
The official Portuguese inquiry into Madeleine's disappearance was formally shelved in July 2008, although private detectives employed by the McCanns have continued the search. The Prime Minister David Cameron recently announced a review of the original investigation.
Could it finally be her, after four years of searching?