A boat speeds on the Jurura river in the Brazilian Amazon forest on March 15. Photo: AFP

Personal items belonging to a missing British journalist and an indigenous expert have been found in the Amazon region where the men disappeared one week ago, Brazilian Federal Police said Sunday.

The latest advancement in the case came just hours after friends and relatives of the pair - freelance journalist Dom Phillips and respected specialist Bruno Pereira - held a vigil on a beach in Rio de Janeiro, with one family member saying she had lost hope that they would emerge from the jungle alive.

"Objects belonging to the two missing persons have been found: a health card, black pants, a black sandal and a pair of boots belonging to Bruno Pereira, and a pair of boots and a backpack belonging to Dom Phillips containing personal clothing," the Federal Police in Amazonas State said in statement.

Fears have been mounting over the fate of Phillips, 57, a veteran contributor to The Guardian newspaper, and 41-year-old Pereira, an expert with Brazil's government agency for indigenous affairs, since they disappeared on June 5 after receiving threats during a research trip to Brazil's Javari Valley.

The far-flung jungle region has seen a surge of illegal fishing, logging, mining and drug trafficking.

The Amazonas Fire Department had previously told local media that personal effects possibly belonging to the missing men had been found "near the house" of Amarildo Costa de Oliveira, the only person arrested so far in the case and who witnesses say pursued the men upriver.

Police said search teams on Sunday covered about 25 square kilometers with "thorough searches through the jungle, roads in the region and flooded vegetation," especially in the area where a boat belonging to Oliveira was found.

AFP