A three-day search of a remote Portugal reservoir has resulted in the reported discovery of a “relevant clue” linked to the disappearace of Madeleine McCann.

Officers concluded their search of the Algarve reservoir on Thursday, where key suspect Christian Brueckner reportedly visited “some days” after the three-year-old vanished on May 3, 2007.

Using sniffer dogs and a tractor-based tree-cutter, authorities scoured Barragem do Arade reservoir in the Algarve – around 31 miles inland from where the McCanns were staying in the Praia de Luz resort.

During the search, a “relevant clue” was found which led to police officers concentrating on a specific paper, according to the Correio de Manhã newspaper.

Police in Portugal said: “[The search] resulted in the collection of some material that will be subject to the competent expertise. The material collected will be handed over to the German authorities.”

As part of this latest three-day investigation, police dug holes of around 60cm and these have been left, along with piles of soil, now that authorities have left the digging area.

The surrounding woodland showed pathways had been cut by heavy machinery, leading to the main flattened 160 square-foot excavation area. A no-fly zone was also imposed over the reservoir for the first two days.

In a statement, police in Portugal said: “[The search] resulted in the collection of some material that will be subject to the competent expertise. The material collected will be handed over to the German authorities.”

The new searches come as the Home Office granted an extra £110,000 in funding this financial year for the Metropolitan Police to assist with finding Madeleine, down from just over £300,000 last year.

The total funding given to Operation Grange has been just under £13.1 million since 2011.

Police have flattened a concentrated area of woodland and dug a number of holes near a remote reservoir in Portugal as part of their three-day hunt for evidence in the Madeleine McCann case.

Huge piles of soil and broken rock were left next to the 160 sq ft area close to the banks of the Barragem do Arade, where officers were seen with shovels for a number of hours on Wednesday afternoon.

Portuguese police confirmed the search concluded on Thursday, and said materials had been sent to Germany for testing.

The surrounding woodland showed pathways had been cut by heavy machinery, with large branches lining the routes towards the area of focus.

The small section of woodland was clearly marked out by officers over the course of their three-day search in Portugal.

The cordon around the site, which had been in place since Tuesday morning to allow officers to scour the area with rakes, pickaxes and sniffer dogs, has since been lifted.

Police were given the go-ahead to search the area after German prosecutors received “certain tips” about the case.

A few kilometres away from the search, blue tents had been erected for briefings to take place.

Police have said materials unearthed during a three-day hunt for evidence over the disappearance of Madeleine McCann at a remote reservoir in Portugal are being sent off for analysis.

Authorities have been scouring Barragem do Arade reservoir in the Algarve this week, using sniffer dogs and cutting down trees as part of the search inland from the coastal resort where the then-three-year-old went missing in 2007.

As police concluded their three-day search on Thursday, they confirmed “materials collected” had been sent to Germany for analysis.

A source close to the investigation told Reuters there was nothing tangible to report, while German prosecutor Christian Wolters played down hopes of a breakthrough, saying: “Of course, there is a certain expectation, but it is not high.”

He added that the investigators were looking for a body, but also for anything that could help the investigation, such as clothing.

Sixteen years after Madeleine McCann vanished from the Algarve holiday apartment where she was sleeping next to her infant twin siblings, police have launched a major new search for evidence.

After laying dormant for several years since David Cameron kickstarted an ultimately fruitless Metropolitan Police inquiry in 2011, the case of the missing three-year-old was revived once more in 2020 when German prosecutors revealed a new suspect.

But three years on, 43-year-old convicted paedophile Christian Brueckner – who denies any connection to the missing youngster – is yet to be charged, as he languishes in a German prison for the rape of a 72-year-old American woman two years prior to Madeleine’s disappearance at the same resort.

The dense vegetation meant they had to use tools including chainsaws to remove trees to access the water properly.

A source close to the investigation told Reuters there was nothing tangible to report, while German prosecutor Christian Wolters played down hopes of a breakthrough, saying: “Of course, there is a certain expectation, but it is not high.”

He added that the investigators were looking for a body, but also for anything that could help the investigation, such as clothing.

Mr Wolters said he did not expect the results of the studies of the collected samples to be announced any time soon.

Police in Portugal have ended the latest search for clues regarding the disappearance of Madeleine McCann, the British child who went missing in 2007 in southern Portugal.

Authorities gave no details about the results of the search Thursday. A statement by Portugal’s Judiciary Police said some material had been collected and would be handed over to German authorities for examination.

The search around a dam some 50 kilometres (30 miles) from the Praia da Luz resort, where the three-year-old girl was last seen 16 years ago, began Tuesday following a request by German authorities.

A German man who is a suspect in the case is currently in jail in Germany for a different case.

Portuguese, German and British police took part in the three-day operation during which detectives probed the banks of the Arade reservoir and also used sniffer dogs and a drone.

As part of this latest three-day investigation, police dug holes of around 60cm and these have been left, along with piles of soil, now that authorities have left the digging area.

The surrounding woodland showed pathways had been cut by heavy machinery, leading to the main flattened 160 square-foot excavation area. A no-fly zone was also imposed over the reservoir for the first two days.

In a statement, police in Portugal said: “[The search] resulted in the collection of some material that will be subject to the competent expertise. The material collected will be handed over to the German authorities.”

The new searches come as the Home Office granted an extra £110,000 in funding this financial year for the Metropolitan Police to assist with finding Madeleine, down from just over £300,000 last year.

The total funding given to Operation Grange has been just under £13.1 million since 2011.

German prisoner Christian Brueckner was first named in connection with the unsolved mystery that summer, and officially named as a suspect last year.

His yellow and white VW T3 Westfalia campervan was reportedly identified as having been near to the Praia da Luz resort in Portugal where the young girl went missing on May 3, 2007.

Three-year-old Madeleine disappeared from the bed of her holiday apartment while her parents and family friends dined 180 feet away. Her two-year-old twin siblings were also in the apartment she went missing from. Madeleine’s parents Kate and Gerry McCann have been searching for answers ever since.

The Metropolitan Police took over the investigation, Operation Grange, in 2011 but they hit dead ends. There has not been another significant suspect in the case since 2007 until Brueckner.