An object was observed. Physiological effects were noted. One gray object, about 20 feet across, was observed by one experienced male witness at an electric plant (Oliveira). One 5.4-foot-tall humanoid, wearing a yellow coverall, was seen.

A night watchman named Oliveira, on duty at the Central Electric Power Station at Urubupunga, saw a helmeted figure and tried to strike him with a metal crowbar; the figure dodged the blows and was joined by two others who overpowered the guard. One of the men, who, unlike the others, were dressed in yellow coveralls, uttered some unintelligible words. The security guard called out for help, at which the 3 men boarded a grayish, unlighted vehicle the size of a Volkswagen station wagon, and flew off into the air. The men were about the same size of the witness.

Google map of this location.