San Diego-based canned tuna giant Bumble Bee Seafoods has known for years that fishing vessels in its supply fleet used forced labor but failed to stop the practice, according to a lawsuit filed Wednesday in San Diego federal court that’s believed to be the first ever to allege human trafficking against a U.S. seafood company.

The lawsuit alleges that Bumble Bee was aware of or should have been aware of the abusive conditions on vessels supplying tuna to the company.

A group of four fishermen from Indonesia, co-counseled by attorneys for NGO Greenpeace USA, have sued Bumble Bee Foods, claiming they experienced forced labor and human trafficking while working on fishing vessels supplying the company.