Well, not citizens, but ethnic Poles https://apnews.com/article/belarus-europe-poland-race-and-et...

https://notesfrompoland.com/2021/05/20/concern-over-four-eth...

https://www.ft.com/content/cfc93283-32b9-4fa7-a769-44df294e7...

https://www.bbc.com/news/world-europe-54090389

The information on betrayed weapon transfer comes from Telegram channels of Belarus opposition I frequent. I, on record, wrote about it 2 months ago https://news.ycombinator.com/item?id=26887403 Now it became clear for what Poland sold them out for.

Nothing in your links supports your claims. The articles don't say anything about the supposed prisoner exchange.

What do you think they exchanged them for then? Do you think Belarus went, and released Poles out of its good will out of a sudden?

it's more likely that the whole story was invented by Belarus KGB in order to justify repressions against politically active citizens.