I can't find source in English, but it's a well known fact taught in school in Lithuania. You can find it in on Lithuanian Wikipedia page[0], that states: "Iš viso sovietų valdžios buvo įkalintas ar deportuotas 81 lietuvių rašytojas."
My translation: "a total of 81 Lithuanian writers were imprisoned or deported by Soviet government".
To name few, well-known writers: Antanas Miškinis, Kazys Boruta, Kazys Jakubėnas. Of course, officially they received some formal accusations. Other writers were forced to write pieces glorifying Lenin, Stalin, Soviet Union and their heroes or be imprisoned/deported too. Some obeyed to avoid ill fate.
0. https://lt.wikipedia.org/wiki/Lietuvi%C5%B3_literat%C5%ABra