German prosecutors investigating the Madeleine McCann case have revealed that police are "searching for evidence" at a reservoir in Portugal.
Forensic teams descended on the Silves reservoir in southern Portugal in May this year, to search for any evidence in the case of missing Madeleine.
Police had said they have 'found' something at the the Portuguese reservoir but can't reveal or discuss it because of the developing case.
Madeleine McCann went missing on the evening of May 3 in 2007, during a family holiday in the Algarve in Portugal.
Madeleine's parents Kate and Gerry returned to their Praia Da Luz apartment to find the then three-year-old gone, and have not yet had a conclusive answer on what really happened to her.
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German Prosecutor Hans Christian Wolters has revealed details of the search, but admitted he "cannot speak of the results" as it may affect the investigation.
It is believed both Portuguese and German authorities were searching for evidence in connection with prime suspect Christian Brueckner, including discarded USB sticks.
Brueckner, 46, was made the prime suspect in the McCann case in 2022, and it is known by police that Brueckner once called the location is "little paradise".
It is also believed by investigators that Brueckner visited the reservoir just days after Madeleine's disappearance.
In a new BBC Panorama documentary, 'Prime Suspect: Who Took Madeleine McCann?', German Prosecutor Hans Christian Wolters spoke of the reservoir searches and their conclusions.
Wolters said: "At the reservoir, we are searching for evidence, not for the body of Madeleine.
"I can't speak about the results because the investigation of the things we found there is still ongoing."
Friedrich Fulscher, Brueckner's lawyer, claims that the police were "only looking for Madeleine's DNA", and that the didn't find any.
German prosector Hans Christian Wolters says the reservoir search results are 'still ongoing'
BBC
Fulscher claimed: "There are certain parts of the files, the results of the investigation, which must always be disclosed to the defence.
"There are different types of expert reports, and in this case they were mainly DNA reports, and the expert opinions that I've seen so far only allow one conclusion, namely that this was a fruitless search."
He added that the police case into Madeleine's disappearance is "close to crashing down".
Brueckner, who is currently serving a seven-year prison term in Germany, has always denied he was involved in the case.