The Ukrainian Navy announced on Monday that it was aware that the soldiers on Snake Island who were at first thought to have died in a Russian assault were in fact alive and being held prisoner by the Russians.
https://m.jpost.com/breaking-news/article-698897
https://m.jpost.com/breaking-news/article-698897
The Jerusalem Post
Ukrainian navy confirms Snake Island soldiers alive, taken by Russia
The Ukrainian navy has demanded the release of all Ukrainian citizens held as POWs by Russia.