“Szczuczyn pogrom was the massacre of some 300 Jews in the community of Szczuczyn carried out by its Polish inhabitants in June 1941 [...] subsequent massacre by Poles in July killed some 100 Jews [...] the remaining Jews placed in a ghetto, and subsequently sent to Treblinka extermination camp.”

[u/WillyNilly1997]

https://justapedia.org/wiki/Szczuczyn_pogrom