Police have arrested a second suspect in the case of a British journalist missing in the Amazon and an indigenous expert.
The man will be interrogated and taken to a hearing in Atalaia do Norte in the far west of Brazil, the Brazilian news portal "G1" reported on Tuesday evening (local time), citing the federal police.
Accordingly, the arrested person was a fisherman, the brother of the only suspect arrested up to that point.
Nine people have been questioned so far, including the wife of the first person arrested.
Dom Phillips and Bruno Pereira did not arrive by boat in the town of Atalaia do Norte on June 5 as planned, according to a regional aboriginal organization.
Pereira had previously reported to the police that he had been threatened several times.
He had recorded illegal activities in the Vale do Javari for the authorities.
Regional media speculated Phillips and Pereira may have been the victims of an ambush on behalf of drug dealers.
Another line of investigation looks at illegal fish farming and hunting.
Concrete clues as to what exactly happened have not yet been released.
According to the media, personal belongings of the two men were found a good week after their disappearance.
There have been conflicting reports that the bodies of the missing people have been found.
The search in the Vale do Javari continued.
Covering an area larger than that of Austria, the Javari Valley is one of the largest indigenous areas in Brazil.
Many indigenous people live in isolation there.
The border area with Peru and Colombia is also particularly conflict-ridden and dangerous due to illegal prospecting for gold, deforestation, fishing and hunting as well as drug smuggling.
British Prime Minister Boris Johnson assured Wednesday at the weekly Question Time in London's House of Commons that it was working with the Brazilian authorities and providing them with any assistance they needed.