The Pori Incident (1969)
On April 12, 1969, during a training flight over Pori, Finland, pilot Tarmo Tukeva was directed by air traffic control to investigate seven "balloons" floating at an altitude of 1,500 to 3,000 meters. As he approached, he found ball- or disc-shaped objects that suddenly accelerated away at tremendous speed before vanishing. Unexplained radar returns were also reported that same day 200 kilometers away, near Vaasa.
Witnesses
1 trainee pilot, air traffic controllers
Why it endures
The only UFO sighting officially acknowledged by the Finnish Air Force, corroborated by independent radar returns at long range.
Official version (contested)
The Finnish Air Force suggested the possibility of a foreign reconnaissance aircraft, without ever confirming this hypothesis or identifying the object's exact nature.