The first incident at OKG was reported on 13 January.
Then the alarms took turns.
In total, there are six incidents at OKG that the police handed over to the Security Police, where the incidents were investigated as "grossly unauthorized position with secret information".
In the police interrogations from the incident on 16 January, it appears that a female security guard at OKG observes a flying object at the nuclear power plant's reactor O3 at 20 o'clock in the evening.
She and another guard colleague then stand on opposite sides of the reactor.
"She looked at the craft in her binoculars and could see that it was flashing green and white alternately," it says in the interrogation transcript.
"Absolutely sure it was not an airplane"
According to the guard, the flying object must then have been just above the chimney on O3.
"Otherwise, she perceived it as a square object, she heard no sound, saw in the binoculars some smaller white lamps flashing in addition to the larger white lamp.
She was absolutely certain that it was not an airplane or anything like that.
The object did not fly very fast but continued south towards the harbor where she lost contact with the object ", it says in the interrogation.
The other security guard also saw the flying object during the same evening, and tried to follow it with the car.
The flying object must then have turned 180 degrees and quickly flown further in the direction of the forest, where it then disappeared.
OKG: A police question
The preliminary investigation regarding all cases has now been closed by Säpo and there is no suspect in any of the cases.
But at the OKG nuclear power plant, they do not want to comment on the fact that in Oskarshamn in particular they seem to have been most clearly exposed to drone intrusion:
- We did not comment on it then and we do not comment on it now either.
It is a police matter, says OKG's communications manager Désirée Liljevall.
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New films show the drones over Swedish nuclear power plants Photo: Säpo / Fanny Renman / SVT