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.

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.

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.