Kate and Gerry McCann pose after speaking about the disappearance of their daughter Madeleine at a news conference in Quorn, central England, Nov. 2, 2010. Madeleine McCann disappeared from her room at a resort in Portugal's Algarve on May 3, 2007, just days before her fourth birthday, as her parents were dining at a nearby restaurant. The case remains unsolved. (REUTERS/Darren Staples)

British police "developed" evidence against the parents of a three-year-old girl who went missing while her family was on vacation in Portugal in 2007, a Wikileaks cable has revealed.

The Sept. 28, 2007 note, labelled confidential, says British Ambassador Alexander Wykeham Ellis told U.S. Ambassador Al Hoffmann the British police were involved in the case of Madeleine McCann.

"Without delving into the details of the case, Ellis admitted that the British police had developed the current evidence against the McCann parents, and he stressed that authorities from both countries were working co-operatively," the leaked cable said. "He commented that the media frenzy was to be expected and was acceptable as long as government officials keep their comments behind closed doors."

McCann was three years old when she went missing May 3, 2007 while on vacation with her parents, Kate and Gerry, and twin siblings, Sean and Amelie. Her parents had put the children to bed and were enjoying dinner with friends about 45 meters away when she went missing.

Her parents were initially listed as suspects in the case, but were cleared in July 2008.

A statement on their Facebook page said there is "absolutely no evidence to implicate" Kate or Gerry in Madeleine’s disappearance.

"To this day, they continue to work tirelessly on the search for their daughter, co-operating when appropriate with both the Portuguese and British authorities."

The McCanns regularly update their website, findmadeleine.com, and plan to release a book about their ordeal in the spring.