Edited sentence: In 2006, India's Sariska Tiger Reserve lost all of its 26 tigers, mostly to poaching.In 2009, the Panna Tiger Reserve also reported that there weren't any tigers left within the sanctuary due to excessive poaching.The Wildlife Protection Society of India (WPSI) works with law enforcement agencies in India to apprehend tiger poachers and traders throughout India.The central and state governments do not systematically compile information on tiger poaching cases and the details come from reports received by WPSI from enforcement authorities, work carried out by WPSI, and other sources.The following figures represent only a fraction of the actual poaching and trade in tiger parts in India.The illicit demand for bones from wild tigers for use in traditional Chinese medicine, coupled with the international trade in tiger skins, continues to be the main reason for the unrelenting poaching pressure on tigers in India.There is virtually no demand for either bones or skins of tigers within India.Tigers known to be killed.To date, WPSI has documented the following cases:.WPSI also makes every effort to investigate and verify any seizure of tiger parts and unnatural tiger deaths that are brought to their notice