The following incidents happened when no German soldiers were on Polish soil.
"On May 20,1945, Henry Slamovich, one of the Jews from Plaszow who had been saved by Oscar Schindler, returned with about twenty-five other young Jews, all of them survivors, to his home town of Dzialoszyce. 'We thought to ourselves,' he later recalled, 'we had survived. We are alive, we are going to enjoy freedom.' Even though his own home was now lived in by non-Jews, Slamovich was determined somehow to rebuild his life in his own town. But, within a week, four of the twenty-five Jews who had returned were murdered by Polish anti-Semites. The rest of the Jews realized they would have to leave. 'It was sad, very sad,' Slamovich recalled, thirty-five years later, in his home in San Francisco."
[. . .]
On July 4, 1946, 42 Jews were slain in the town of Kielce. The Polish mob "attacked the building of the Jewish Committee in Kielce. Almost all the Jews who were inside the building, including the Chairman of the Committee, Dr Seweryn Kahane, were shot, stoned to death, or killed with axes and blunt instruments. Elsewhere in Kielce, Jews were murdered in their homes, or dragged into the street and killed by the mob. Two, Duczka and Adas Fisz, were children. Four, Bajla Gernter, Rachel Zander, Fania Szumachar and Naftali Teitelbaum, were teenagers on their way to Palestine."
(Source: Martin Gilbert, The Holocaust, New York, 1985, pp. 812-821)