Human remains have been found in Brazil during a search for missing British journalist Dom Phillips and indigenous expert Bruno Pereira.
"The evidence suggests that something bad was done to them, as human entrails were found in the river," President Jair Bolsonaro told CBN Recife radio on Monday.
These would now be subjected to a DNA test.
According to the British “Guardian”, an employee of the Brazilian ambassador in London is said to have given the Phillips family this information on Monday.
Phillips' niece Dominique Davies told AFP that "two bodies were found".
The relatives are now waiting for confirmation from the federal police as to whether the two are missing.
The police have not yet confirmed this information.
Traces of blood found in the boat
The 57-year-old Phillips, who writes regularly for the Guardian as a freelance journalist, had been researching a book about violence against indigenous people in the Javari Valley near the border with Peru together with Pereira, an expert on indigenous peoples.
The two men have been missing for a week.
Gold miners, poachers and drug gangs are active in the region.
According to indigenous organizations, the men had previously been threatened.
According to the authorities, personal belongings of the two men were found near the house of a suspect in the Amazon rainforest over the weekend.
Investigators arrested him on Wednesday.
Witnesses said they saw the man chasing Phillips and Pereira's boat.
Traces of blood were later found in the man's boat.