NEW YORK - The Official Committee of Unsecured Creditors in the Chapter 11 bankruptcy of Excel Maritime Carriers Ltd. on Sept. 10 filed a brief arguing that Excel "improperly seeks discovery" from a prepetition expert that was hired by an ad hoc committee of unsecured creditors (In Re: Excel Maritime Carriers Ltd., No. 13-23060, Chapter 11, S.D. N.Y. Bkcy.).