One morning in September 1977, a 24-year-old doctor named Filagi Carvalho hurried into the examination room at a hospital in a remote fishing village in northern Brazil. The town was called Colares, and it was so small that Dr. Carvalho was actually the only doctor at the hospital. This had made her exceptionally good at treating all kinds of medical emergencies because she had to handle virtually everything.
Despite all that experience, when Dr. Carvalho walked into the exam room and saw her new patient—a middle-aged woman lying on her back on the examination table—she immediately realized she was looking at something she had never seen before. It was unlike anything she had ever encountered. It was very curious.
The woman had a very large burn on her chest, and she was clearly terrified by it. She begged Dr. Carvalho to help her. Dr. Carvalho walked over to the woman, who was extremely upset, and calmly told her to relax. She assured her that she would examine the injury and figure out what was going on.
After putting on a pair of rubber gloves, Dr. Carvalho gently began examining the burn.
She immediately noticed that it was very unusual. It was a perfect circle—remarkably uniform in shape—and about the size of a soccer ball, making it quite large. At first glance, it resembled a severe sunburn.
However, there were two small but clearly visible puncture wounds in the center of the burn. They almost looked like the marks from a spider bite that had somehow caused the massive burn. It was simply odd.
Dr. Carvalho honestly had no idea what she was looking at, so she asked the woman, “How did you get this burn?”
The woman, still extremely upset and obviously uncomfortable, began stumbling through what sounded like an outrageous story.
She said she had been in her backyard when she noticed something flash overhead. Looking up, she saw a large flying cylinder that appeared to be made of metal. According to her, the cylinder suddenly shined a beam of light onto her. She described the beam as feeling as though it had latched onto her chest. Then she felt something puncture her chest, followed by the sensation that blood was being pulled out of her body.
Just as suddenly as it had begun, the light disappeared. Whatever had punctured her chest was gone, and both the cylinder and the beam of light vanished without a trace, leaving behind the horrific mark on her chest.
Dr. Carvalho listened politely as the woman spoke. She nodded appropriately and appeared genuinely interested in every detail of the story.
But when the woman finished, Dr. Carvalho couldn’t believe what she had heard.
She thought to herself, That couldn’t have happened. That’s absolute nonsense.
At that point, she assumed the woman must have been experiencing some kind of mental health episode. However, she didn’t say that aloud. Instead, she explained that the woman needed to be transferred to a larger hospital about three hours away in the nearest major city.
Realistically, Dr. Carvalho knew the larger hospital would have the facilities and resources necessary to treat the woman’s burn, the puncture wounds, and whatever else might have been affecting her mentally.
With that, Dr. Carvalho left the examination room to arrange the woman’s transportation.
Not long afterward, the woman was on her way to the larger hospital.
After that, Dr. Carvalho didn’t think much about the incident.
The following day, however, she learned that the woman had died after succumbing to her injuries.
A few days later, Dr. Carvalho was back in the examination room, staring in shock at another patient.
This time, it was a man.
He had the exact same circular burn on his chest, complete with the two small puncture wounds in the center—the same strange pattern as the woman who had died only days earlier.
However, as Dr. Carvalho examined him, she noticed that his injury appeared less severe. The burn was in the same location and looked almost identical, but it wasn’t as intense. It seemed lighter, giving her hope that he might survive.
The man himself also seemed remarkably calm. Unlike the woman, who had been hysterical, he appeared completely composed.
He simply said, “I have this burn.”
Dr. Carvalho felt optimistic. Not only did she think she might be able to treat him at her small hospital, but she also believed he would finally tell her what had really happened.
She was convinced there had to be a logical explanation.
Surely this man’s story would explain what had happened to the woman, and it certainly wouldn’t involve some mysterious flying cylinder in the sky.
Putting on her gloves, Dr. Carvalho gently applied burn ointment to the man’s chest.
As she worked, she asked, “What happened? How did you get this?”
Much to her surprise, the man calmly told almost the exact same story as the woman.
He described a large metallic flying cylinder that had shined a beam of light onto his chest. According to him, the beam seemed to latch onto him before something punctured his chest and began drawing blood from his body.
It was virtually the same story.
Dr. Carvalho was accustomed to patients occasionally lying about how they had been injured. Usually, however, people lied to make their stories sound more believable—not less.
At that point, she didn’t know what to believe.
Whatever was happening was clearly real, but she had no idea what could possibly explain it.
Over the following weeks, things became even stranger.
More and more patients arrived at the hospital with the same large circular burns.
Eventually, it reached the point where Dr. Carvalho was treating a new patient almost every single day who claimed to have been attacked by some kind of blood-sucking UFO.
By November of that year, the entire region was gripped by fear.
People armed themselves with guns, fireworks, and anything else they believed could protect them from what many assumed were aliens from outer space.
Although Dr. Carvalho understood why people were reacting that way, she still couldn’t accept that explanation.
After all, people really were being injured.
Some were even dying.
There was no obvious explanation, so she understood the fear.
Still, despite witnessing these cases every day, she remained convinced there had to be a rational answer.
“It can’t be blood-sucking aliens,” she thought. “There has to be something else causing this.”
Then, one evening in late November, Dr. Carvalho left the hospital and began walking home.
Instead of taking her usual route, she decided to take the longer path along the beach so she could clear her mind.
About twenty minutes later, she was strolling across the sand, looking out over the ocean.
Even though it was dark, people were still enjoying the cool evening breeze, and everything felt peaceful.
Then, without warning, an ear-piercing scream shattered the silence.
A terrified woman came sprinting across the beach, waving her arms frantically and pointing behind her.
“There’s a UFO!” she screamed.
Dr. Carvalho turned to look in the direction the woman was pointing.
She gasped.
Hovering roughly one hundred feet above the water was a massive metallic cylinder about the size of a tractor.
It simply hung there in complete silence.
It looked exactly like the object every one of her patients had described.
There it was.
For the first time, Dr. Carvalho wasn’t just skeptical.
She was terrified.
Everyone else on the beach began screaming and running for cover, desperate to get as far away from the object as possible.
Dr. Carvalho’s first instinct was to run with them.
But then another thought crossed her mind.
This is my chance.
This was the opportunity she had been waiting for—the chance to get a closer look at the mysterious object that was apparently responsible for all the strange attacks.
So, instead of running away, Dr. Carvalho ran toward it.
While everyone else fled in the opposite direction, she sprinted down the beach until she was standing almost directly beneath the hovering cylinder.
She looked up.
The enormous metallic object floated silently about one hundred feet above the water.
Dr. Carvalho was overwhelmed with awe.
She had never seen anything remotely like it.
At that moment, she became convinced that whatever she was looking at had not originated on Earth.
For several moments, she simply stood there, staring at the mysterious craft.
Then, without warning, the UFO accelerated away and disappeared.
Following the incident, the Brazilian military traveled to Colares to investigate the growing number of UFO sightings.
During their investigation, officials documented more than 400 people who claimed they had been burned by mysterious beams of light emitted from flying cylinders.
Several of those victims later died from their injuries.
As for Dr. Carvalho, she was never attacked by one of the mysterious beams of light.
However, after witnessing the object herself, she publicly stated in newspaper interviews that she firmly believed what she had seen was a genuine UFO—something that did not come from Earth.
The military investigation eventually became known as Operation Saucer.
Despite collecting reports, interviewing witnesses, and documenting numerous incidents, Operation Saucer never provided a definitive explanation for the mysterious flying objects.
To this day, the events remain one of Brazil’s most famous UFO mysteries.
The Brazilian government maintains that it has fully declassified all the documents related to Operation Saucer.
However, one military officer who participated in the investigation later claimed that some evidence had never been released to the public.
Whether the people of Colares were attacked by an unknown natural phenomenon, secret military technology, mass hysteria, or something far more extraordinary remains an unsolved mystery—one that continues to fascinate investigators and UFO enthusiasts around the world.