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The following is a list of massacres that have occurred in Slovenia or its territory (numbers may be approximate):
| Name | Date | Location | Deaths | Notes |
|---|---|---|---|---|
| Marburg's Bloody Sunday | 27 January 1919 | Maribor | 9 – 13 civilians of German ethnic origin | Possibly accidental or German provoked |
| Celje prison massacre | 22 July 1942 | Celje | 100 Slovenian civilians | |
| Maribor prison massacre | 2 October 1942 | Maribor | 143 Slovenian civilians | |
| Frankolovo crime | 12 February 1945 | Frankolovo | 100 Slovenian civilians | Members of the Wehrmacht killed one hundred Slovene civilians |
| Pečovnik Mine massacre | May 1945 | Pečovnik Mine, Zvodno | 12,000 Croats civilians | Yugoslav Partisans killed 12,000 Croats by forcing them into the mine and covering them with concrete |
| Teharje camp | May 1945 - October 1946 | Teharje | 5,000 | It is estimated that the postwar authorities executed approximately 5,000 internees of Teharje without trial during the first month or two after the Second World War |
| Sterntal camp | May - October 1945 | Kidričevo | 5,000 | |
| Barbara Pit massacre | 25 May – 6 June 1945 | Huda Jama, PR Slovenia | 1,416 | Mass killing of prisoners of war of Ante Pavelić's NDH Armed Forces and the Slovene Home Guard, as well as civilians, after the end of World War II in Yugoslavia in an abandoned coal mine near Huda Jama, by the Yugoslav Partisans |
| Lokavec massacre | 20 June 1945 | Lokavec, Ajdovščina | 5 - 7 Slovenian civilians | Murders of five to seven Slovenian civilians |
