Treblinka was an extermination camp built by Nazi Germany in occupied Poland during World War II. It was located near the Treblinka village in the modern-day Masovian Voivodeship north-east of Warsaw. The camp operated officially between 23 July 1942 and 19 October 1943 as part of Operation Reinhard (the most deadly phase of the Final Solution). During this time, more than 800,000 Jews as well as unknown numbers of Romani people were murdered there. The victims included men, women, and children.[ Other estimates of the number killed at Treblinka exceed 1,000,000.