Can you cite that? According to the official statistics the population of the whole region is around 1 032 000 people now and has been around 1 029 000 in 2021, the stats are mirrored in wiki, russian only:
ru.wikipedia.org/…/Население_Калининградской_обла…
The official source is rosstat.gov.ru but my browser says that there is a potential security risk.
Valmond@lemmy.world 11 hours ago
And according to the Kremlin, it was a 3 day operation. Very efficient.