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On a recent afternoon, Jean Lumi Ngoungou was sawing planks of pinkish okoumé at a plywood factory.

Immigration and Customs Enforcement confirmed to Oregon Public Broadcasting that its Homeland Security Investigations division has an ongoing investigation into illegal imports of �ǰ�dzܳ�é, a wood used for plywood and veneer siding.

Okoumé hardwood trees grow in the rainforests of west-central Africa, where the deforestation of habitat for endangered species is drawing the concern of conservationists and scientists alike.

In a statement, Roseburg Forest Products said it would cooperate with the investigation and that the company was unaware of alleged issues with its okoumé suppliers until federal investigators called.

The engravings show they are Okoume tropical hardwood trees from Banda Nord - one of two forest cutting zones in Congo-Brazzaville used by logging company Taman Industries Limited.