The Leliefontein massacre occurred at the Leliefontein mission station in the Northern Cape, South Africa on 31 January 1902. Boer leader Manie Maritz executed 35 indigenous inhabitants of the settlement as punishment for attacking his party when he went to interview the European missionaries in the town during the Second Boer War. Deneys Reitz described the attack as a "ruthless and unjustifiable act" and mentioned that Jan Smuts was displeased when he accompanied Reitz to the site of the massacre, afterward.