Eleven crew members are under arrest. South Korean authorities search the offices of 20 affiliates of Cheonghaejin Marine Co., the ferry’s owner. The Yonhap News Agency reports that authorities have also searched the home of Yoo Byung-eun, a billionaire who, together with his two sons, controls the shipping company that operated the Sewol. Investigators reportedly seek evidence of possible wrongdoing in regard to the ship’s safety inspection. The cause of the accident is still unknown.