California’s civil rights regulator said it sued Tesla Inc. over claims of racial discrimination at the company’s facilities in the state.

After receiving hundreds of complaints from workers, the state’s Department of Fair Employment and Housing “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 agency’s director, said in a statement.

The suit was filed Wednesday in Alameda County Superior Court, the agency said. The complaint wasn’t immediately available on the court’s website.

Tesla said in a Feb. 8 blog post before the suit was filed that the company “will be asking the court to pause the case and take other steps to ensure that facts and evidence will be heard.”

The agency is the state-level equivalent of the better-known U.S. Equal Employment Opportunity Commission, with a mission to protect Californians from unlawful discrimination in employment, housing and accommodations.