The U.S. Securities and Exchange Commission (SEC) submitted documents on Friday local time showing that the institution is investigating Fisker and has issued multiple subpoenas to the bankrupt electric car manufacturer. Fisker filed for bankruptcy protection in June this year after running out of cash to increase production of its Ocean SUV model. After selling its fleet and reaching settlements with creditors, the company is gradually winding down its bankruptcy operations. The company plans to request approval of its liquidation plan from the U.S. bankruptcy judge at a court hearing scheduled for October 9 in Wilmington, Delaware.