The state of California is suing Tesla over allegations of operating a “racially segregated workplace” at its factory near San Francisco.

California’s department of fair employment and housing (DFEH) said it had filed a lawsuit alleging widespread discrimination and harassment of black employees following complaints from hundreds of Tesla workers at its main factory in Fremont.

“After receiving hundreds of complaints from workers, DFEH found evidence that Tesla’s Fremont factory is a racially segregated workplace where black workers are subjected to racial slurs and discriminated against in job assignments, discipline, pay, and promotion creating a hostile work environment,” Kevin Kish, the DFEH’s director, said in a statement.

The department claimed black Tesla workers were subjected to racist graffiti and racial slurs. The agency said it filed its lawsuit at on Alameda county superior court late on Wednesday, and would make the complaint available to the