A second man has been arrested after the disappearance of the British journalist Dom Phillips and his companion in the Amazon rainforest.
Mr Phillips and Bruno Pereira, a Brazilian indigenous expert, went missing more than a week ago on a remote stretch of the Itaquai River.
Police say the second man, Oseney da Costa de Oliveira, is the brother of the first man who was arrested.
Amarildo da Costa de Oliveira, who is nicknamed Pelado, remains in custody as the main suspect in the case.
Describing the latest arrest, police investigator Alex Perez said: “He did not resist arrest on suspicion of homicide based on witness accounts that placed the two suspects at the supposed scene of the crime.”
Ammunition and an oar have also been seized, but detectives have not confirmed why these items have been confiscated, where they were found or who they belong to.
Mr Phillips, 57, and Mr Pereira, 41, were last seen on 5 June near the entrance of the Javari Valley Indigenous Territory, which borders Peru and Colombia.
The brothers, both 41-year-old fishermen, are being held at the police station in Atalaia do Norte, the nearest town.
Pelado pulled a rifle on Mr Phillips and Mr Pereira the day before they disappeared, according to indigenous people who were with them.
He denies doing anything wrong and claims military police tortured him to get a confession, his family has said.
The hunt for Mr Phillips and Mr Pereira appears to be nearing its end, as the search area gets smaller.
‘We understand we are heading towards the end’
Eliesio Marubo, a lawyer who has been helping to look for the men, said the discovery of evidence had helped to narrow the search.
“We understand that we are heading toward the end,” he said.
Police found a backpack, laptop and other personal items in a river on Sunday and there were reports that the men’s bodies had also been found, though officers denied this on Monday.
The area in which Mr Phillips and Mr Pereira went missing has been rocked by violent conflicts between fishermen, poachers and the government.
Mr Pereira previously led the local bureau of the government’s indigenous agency, known as Funai, and has been involved in several operations against illegal fishing.
There has also been violence as gangs battle for control of waterways to ship cocaine.
The Javari Valley has seven known indigenous groups – some only recently contacted – and at least 11 uncontacted groups, giving it the biggest concentration of isolated tribes in the world.