The last known surviving member of an Amazon tribe—dubbed “The Man of the Hole”—has died in Brazil, after resisting any contact with the outside world for nearly 30 years, officials said, The New York Post reported.

Brazil’s National Indian Foundation, FUNAI, announced the tribesman’s passing on Saturday.

“(FUNAI) informs, with immense regret, the death of the indigenous known as ‘Tanaru Indian’ or ‘Hole Indian,’ who lived in voluntary isolation and was monitored and protected by Funai through the Ethnoenvironmental Protection Front. Guaporé, in the state of Rondônia, about 26 years ago,” the agency said in a press release. “The indigenous man was the only survivor of his community, of unknown ethnicity.”

FUNAI reported that the man’s body was found in his hammock inside a hut last Tuesday by officials tasked with monitoring the remote Tanaru Indigenous Territory in Rondonia state in the western Brazilian Amazon, where he had been living in “voluntary isolation.”

There were no signs of violence or struggle, and it appears “The Man of the Hole”—so nicknamed after his habit of constructing deep holes—died of natural causes. He was thought to have been about 60 years old.

Brazil’s Federal Police will perform an autopsy on the man’s body and produce a report on the findings.

“The Man of the Hole” was last filmed by a government team in 2018, when he was seen using a sharpened tool resembling an ax to hack at a tree.