The Equal Employment Opportunity Commission has opened an investigation into ride-hailing service Uber for gender discrimination, The Wall Street Journal reports. The probe reportedly began last August and is taking a closer look at the company culture within Uber—particularly “hiring practices, pay disparity and other matters as they relate to gender.” Investigators have since reviewed documents and spoken to former and current employees. The EEOC typically picks up cases after employees submit a formal complaint, and it is unclear whether the agency will take action against the company. Uber has been subject to restructuring since flags were raised about how the company addressed sexual harassment and race. It pushed out controversial CEO Travis Kalanick and fired 20 people last year after an internal review.