Last updated: June 16, 2026
In October 1977, something began happening on Colares, a small island in the mouth of the Amazon River in Pará state, Brazil. Residents reported lights descending from the sky — intense beams that burned skin, caused puncture marks, induced paralysis, and left victims with symptoms resembling acute anemia. The locals called the phenomenon chupa-chupa — “suck-suck” — because witnesses described a sensation of being drained. Dozens of people sought medical treatment for injuries they attributed to encounters with the lights. Some required blood transfusions.
The Brazilian Air Force was paying attention. What followed became one of the most extensively documented official UAP investigations in history: Operação Prato — Operation Saucer — a classified military inquiry that ran from October 20 through December 5, 1977, producing 130 official records including photographs, films, medical reports, and witness testimonies. The Brazil UFO Colares case remained classified for nearly three decades. When the files were finally released, they forced a reckoning with what Brazilian authorities had seen — and what they had chosen not to say.
Operação Prato: The Air Force Investigation
The Brazilian Air Force launched Operação Prato in direct response to the scale of the Colares incidents. The operation was commanded by Captain Uyrangê Hollanda Lima, stationed at the Belém Air Force Base in Pará. Over the course of two phases — October 20 to November 11, and November 25 to December 5, 1977 — Hollanda Lima and his team camped on Colares and surrounding areas, observing and recording. They photographed aerial phenomena. They filmed objects at night. They interviewed hundreds of witnesses. They compiled medical assessments of injured residents.
The final report, filed in February 1979, contained 130 records and reached a conclusion that the Brazilian military buried for twenty-five years: the phenomena observed over Colares were “unidentified phenomena of unknown origin.” The Air Force could not explain what it had seen. It could not identify the objects. And it classified the entire investigation.
As CNN Brasil reported in its coverage of the eventual declassification, the Operação Prato files represented something unusual even by the standards of government UAP secrecy: not a dismissal or debunking, but an official acknowledgment of genuine anomalous phenomena that resisted explanation — followed by silence.
Captain Hollanda’s 1997 Confession
In 1997 — seven years before the files were declassified — Captain Hollanda Lima broke his silence. In a remarkable recorded interview, he acknowledged that he and his team had not merely observed distant lights. They had direct sightings of the objects. They had photographed them at close range. He described craft that defied conventional aerodynamics, objects that responded to the presence of observers, phenomena that his team experienced as interactive rather than passive.
Hollanda Lima gave the interview to Brazilian UAP researcher Ademar José Gevaerd. The recordings were considered significant both for their content and for the evident emotional weight Hollanda Lima brought to them. He spoke of the investigation as something that had marked him profoundly — a set of experiences that did not fit any framework the Air Force had given him. Tragically, Hollanda Lima died by suicide shortly after the interview was recorded, a fact that Brazilian UAP researchers have noted without being able to fully contextualize.
As Jornal Opção observed, the 1997 interview effectively pre-authenticated the classified files years before they were publicly released. When the documents finally emerged, researchers found that Hollanda Lima’s account aligned closely with what the official records contained.
The Physical Evidence: Injuries That Couldn’t Be Explained Away
What makes the Brazil UFO Colares Operation Saucer case particularly difficult to dismiss is the body of medical evidence. The chupa-chupa phenomenon was not experienced purely as visual. Residents sustained burns consistent with focused radiation or directed energy — circular lesions, often on the neck, chest, or limbs at points of apparent beam contact. Many reported temporary paralysis during encounters. Blood tests on multiple victims showed hemoglobin levels consistent with significant blood loss despite no external wounds explaining the deficit.
Dr. Wellaide Cecim Carvalho de Oliveira, a physician working in Colares at the time, treated dozens of cases. She signed medical affidavits included in the Operação Prato files describing injuries she characterized as unlike anything in her clinical experience — burns with characteristics suggesting directed electromagnetic radiation, combined with the blood-count anomalies. Her documentation became a cornerstone of the declassified record.
The Operação Prato investigators photographed some of the skin lesions. Those photographs are among the most disturbing elements of the declassified files — physical evidence, documented by the military, of harm inflicted by phenomena the military could not identify.
Declassification: The OVNI Fund and Brazil’s National Archive
The Operação Prato files were declassified in 2004 — the same year Mexico’s SEDENA released the Campeche UAP footage, in what proved to be an unexpectedly productive year for Latin American UAP transparency. The Brazilian Air Force transferred the documents to the Arquivo Nacional (Brazil’s National Archive), where they were catalogued as part of what became known as the OVNI Fund — Fundo OVNI in Portuguese. The SIAN (Sistema de Informações do Arquivo Nacional) digital archive system made the records accessible to researchers.
The release followed advocacy from Brazilian researchers and a formal military acknowledgment that the Operação Prato files no longer met criteria for continued classification. As O Antagonista noted in its analysis, the declassification did not come with a government statement reinterpreting the findings — the Air Force’s original conclusion (unknown origin, unidentified phenomena) simply became public record without further elaboration.
A second batch of Brazilian military UAP files was declassified in subsequent years, and the Arquivo Nacional continued to add materials to the OVNI Fund through the 2010s. Brazil became, somewhat quietly, one of the most substantively documented countries in the world for official UAP records — a fact that receives minimal attention in English-language UAP media.
Why Colares Still Matters
The Colares case is not primarily interesting because of its strangeness, though it is undeniably strange. It matters because it represents something structurally significant: a government that investigated UAP encounters rigorously, documented physical effects on civilian populations, concluded it could not explain what happened, and then kept that conclusion secret for a quarter century.
That pattern — investigation, documentation, concealment, eventual disclosure — is not unique to Brazil. It is visible in varying forms across the UAP disclosure histories of the United States, France, the United Kingdom, and other nations. What makes Colares unusual is the severity of the alleged physical effects, the scale of civilian impact, and the explicit testimony of the commanding investigator that the phenomena were real, anomalous, and interactive.
For researchers approaching the Brazil UFO Colares Operation Saucer case now, the Arquivo Nacional files offer a foundation that most UAP cases lack: official military photography, medical documentation, hundreds of witness statements, and a formal investigative conclusion — all in the public record. The gap remains not in what happened, but in what it means. That is the question the Operação Prato files leave open, in 130 archived records, for anyone willing to look.
The Colares case, the Operação Prato files, and Brazil’s OVNI Fund represent the kind of primary-source UAP disclosure history that most English-speaking audiences have never encountered. Covered at length in Portuguese by CNN Brasil, Jornal Opção, and O Antagonista, the story remains largely untranslated — and largely unknown — beyond Brazil’s borders.
Frequently Asked Questions
What was Operation Saucer (Operação Prato)?
Operation Saucer (Operação Prato) was a classified Brazilian Air Force investigation that ran from September to December 1977, prompted by a wave of UAP encounters on Colares island in Pará state. It is one of the most extensively documented official military UAP investigations in history, compiling over 500 pages of reports and hundreds of photographs.
What happened during the Colares UFO incidents in 1977?
Beginning in October 1977, residents of Colares — a small island in the Amazon River delta — reported lights descending from the sky that burned skin, caused puncture wounds, induced paralysis, and produced symptoms resembling acute anemia. Dozens sought medical treatment; some required blood transfusions. The phenomenon was called “chupa-chupa” by locals, meaning “suck-suck.”
Has Brazil officially released its UAP investigation files?
Brazil began releasing official UAP investigation files in 2009 following pressure from civilian researchers. Documents from Operation Saucer, including reports and photographs compiled by Brigadier Uyrangê Hollanda, have since been partially declassified and are available to researchers.
What was the “chupa-chupa” phenomenon?
“Chupa-chupa” is the term Colares residents gave to the lights that allegedly produced physical injuries — burns, puncture marks, and a sensation of being drained. Multiple witnesses reported seeking medical treatment after encounters, and the name reflected the perceived sensation of vital energy being extracted during the incidents.
