The forced-labor probes follow Section 301 investigations launched on Wednesday, targeting excess industrial capacity across more than a dozen economies.

The move comes after the US Supreme Court struck down a key part of Donald Trump's tariffs policies last month.

The U.S. decision to launch a slew of new investigations into key trading partners has raised eyebrows among analysts, who question both the timing and objectives of the probes.

The forced-labor probes follow Section 301 investigations launched on Wednesday, targeting excess industrial capacity across more than a dozen economies.

Jamieson Greer announced investigations into 60 economies to determine if they have failed to curb imports of goods made with forced labor.