Treblinka II was a NaziGerman extermination camp in occupied Poland during World War II. Between July 1942 and October 1943, around 850,000 people were killed there, more than 800,000 of whom were Jews, including several thousand Gypsies and 2,000 Romani people. The camp was closed after a revolt during which a few Germans were killed and a small number of prisoners escaped. The nearby Treblinka I was a forced labor camp and administrative complex in support of the death camp. Treblinka I operated between 1941 and 1944. In this time half of the 20,000 inmates died from execution, exhaustion, or mistreatment.