Lieutenant Franciszek Ząbecki (Polish pronunciation: [fraɲˈt͡ɕiʂɛɡ zɔmˈbɛt͡skʲi]; 8 October 1907 – 11 April 1987) was a station master at the village of Treblinka. During the German occupation of Poland in World War II, Ząbecki worked as a dispatcher for the Deutsche Reichsbahn; he also became a secret soldier in the underground Armia Krajowa (AK), collecting classified data and reporting to the Polish resistance on the Holocaust transports that went to Treblinka extermination camp. Over 800,000 Jews were murdered there in the course of Operation Reinhard, the deadliest phase of the Holocaust in Poland. Ząbecki himself estimated that number to be 1,200,000 people.