Indonesia has identified five tin firms as "corporate suspects" in an illegal mining case linked to state-owned PT Timah. The companies named are PT Tinindo Inter Nusa, PT Refined Bangka Tin (RBT), CV Venus Inti Perkasa, PT Stanindo Inti Perkasa, and PT Sariwiguna Binasentosa.

Between 2018 and 2019, the companies were said to have conspired with former PT Timah executives to enable illegal mining and falsify smelting transactions. While formal charges are yet to be filed, the companies and their representatives were unavailable for comment.

In December, two former executives from PT Timah and RBT received eight-year prison sentences for their involvement. The illegal mining activities reportedly resulted in around 29 trillion rupiah in state losses and environmental damages valued at 271 trillion rupiah.