The Environment and Forestry Ministry has arrested six people for the alleged poaching of Sumatran tigers in Solok, West Sumatra.
The ministry's team received information from forest police officers in Jambi province about the illegal operation, the ministry's law enforcement director-general, Rasio Ridho Sani, said.
"The finding comprises bones and teeth from Sumatran tigers suspected to be brought by the perpetrators from the Kerinci Seblat National Park in Jambi," the ministry's spokesman, Djati Witjaksono Hadi, said on Monday.
The six people were being questioned by the West Sumatra Natural Resources Conservation Agency (BKSDA).
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Last year, law enforcers arrested three members of an alleged Sumatran tiger poaching group in protected forests within the national park in Marike subdistrict, Langkat, North Sumatra.
Groups of poachers of rare and endangered Sumatran tigers are believed to have long been operating in the protected forests.
Poaching of endangered Sumatran tigers is rampant in the national park. Sumatran tigers are hunted and killed not only for their skins but also their organs.