Short translation from Swedish:
The object came from above, made two turns, then flew parallel to the aircraft for a while.
The witness estimated the size of the object to 10-20 times larger than a Boeing 767.
He reported it to UFO Sweden.
Its a decent sighting of something unidentified but ultimately... it look like condensation streaks from a regular old airplane. He sounds credible,
but I see nothing that support it being "10-20 times larger than a 767". Especially not at his estimated 2km meter distance. I have seen larger
streaks from the ground.
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