Human remains have been found in the search for a British journalist and Brazilian indigenous expert who disappeared deep in the Amazon after receiving threats, Brazil's president confirmed Monday.

Relatives of veteran correspondent Dom Phillips and respected indigenous specialist Bruno Pereira meanwhile said authorities informed them two bodies had been found -- though police and local indigenous leaders denied that, adding to confusion around the case.

The families of Phillips, 57, and Pereira, 41, have endured an anguished wait for news since the pair disappeared a week ago Sunday during a reporting trip to Brazil's Javari Valley, a remote jungle region rife with illegal fishing, logging, mining and drug trafficking.

"The evidence leads us to believe something bad was done to them, because human innards were found floating in the river, which are now undergoing DNA testing," President Jair Bolsonaro said.

Brazilian helicopters patrolled the municipality of Atalaia do Norte, in Amazonas state, as part of the search for missing indigenous expert Bruno Pereira and journalist Dom Phillips
Brazilian helicopters patrolled the municipality of Atalaia do Norte, in Amazonas state, as part of the search for missing indigenous expert Bruno Pereira and journalist Dom Phillips AFP / Joao Laet

The development came a day after police said they had found personal items belonging to the two, including Pereira's health card, pants and boots, as well as Phillips's backpack and clothing.

Bolsonaro, whose government has faced accusations of failing to act urgently enough in the case, said hope was fading.

"Because of the time that's passed -- eight days now, approaching the ninth -- it's going to be very difficult to find them alive," the president told CBN Recife radio.

"I pray to God for that to happen, but the information and evidence we're getting suggest the opposite."

A protester in Rio de Janeiro with a banner depicting a missing British journalist and Brazilian indigenous expert, asking 'Where are Dom Phillips and Bruno Pereira?'
A protester in Rio de Janeiro with a banner depicting a missing British journalist and Brazilian indigenous expert, asking 'Where are Dom Phillips and Bruno Pereira?' AFP / CARL DE SOUZA

Phillips's niece Dominique Davies told AFP via text message that authorities had informed the family two bodies had been found.

"We are waiting on confirmation from the federal police (in Brazil) as to whether they are Dom and Bruno. We all remain upset and distressed at this time," she said.

Veteran foreign correspondent Dom Phillips talks to two men in Roraima State, Brazil in November 2019
Veteran foreign correspondent Dom Phillips talks to two men in Roraima State, Brazil in November 2019 AFP / Joao LAET

Britain's Guardian newspaper, where Phillips was a regular contributor, said the bodies were found tied to a tree, according to information given to Phillips's family by an aide to Brazil's ambassador in London.

Federal police said in a statement that reports that Phillips and Pereira's bodies had been found were incorrect. And the Union of Indigenous Peoples of the Javari Valley (UNIVAJA), which is taking part in the search, denied two bodies had been found.

The police have confirmed they are analyzing a blood sample and suspected human remains found during the search to determine whether they are from the missing men.

They said the results of these analyzes are expected "during this week."

A Federal Police expert examines a boat seized by the Task Force for the rescue of Indigenist Bruno Pereira and Journalist Dom Phillips at the port of the city of Atalaia do Norte, Amazonas, Brazil, on June 11, 2022
A Federal Police expert examines a boat seized by the Task Force for the rescue of Indigenist Bruno Pereira and Journalist Dom Phillips at the port of the city of Atalaia do Norte, Amazonas, Brazil, on June 11, 2022 AFP / Joao LAET

Pereira's wife Beatriz Matos said Monday on Twitter that the police had confirmed "no body was found."

She added that "the confusion caused by the Brazilian embassy in London cannot demobilize the searches", which she said must be "intensified."

"We the family members need answers and certainty, and only with real evidence will we have that," Matos said.

Brazilian police have arrested a suspect in the case, 41-year-old Amarildo Costa de Oliveira, nicknamed "Pelado."

Witnesses say they saw him threaten Phillips and Pereira prior to their disappearance, then pursue them in his boat just before they disappeared.

The blood sample being analyzed was found on a tarp in Oliveira's boat.

The search has been complicated given the difficult jungle terrain in the far-flung Javari Valley, where the men had traveled by boat gathering material for a book Phillips was writing about sustainable ways to protect the world's biggest rainforest.

Brazil's government faces pressure from international media organizations, rights groups and high-profile figures over the case -- fueling criticism of Bolsonaro's policies on the Amazon, where illegal deforestation and other environmental crimes have surged since he took office in 2019.

Dozens of indigenous protesters marched Monday in Atalaia do Norte, the small city Phillips and Pereira had been headed to, demanding answers on their whereabouts.

"It's been a week... and every day brings conflicting reports," Natalie Southwick, Latin America coordinator for the Committee to Protect Journalists (CPJ), said in a statement.

"CPJ remains deeply concerned about the government's insufficient response and lack of transparency. Brazilian authorities must stop dragging their feet."

Irish rock band U2 became the latest to rally to the cause, joining Brazilian football legend Pele and singer Caetano Veloso.

"Where are Dom Phillips and Bruno Pereira?" it reads.