DETROIT - Two retiree groups for employees of the bankrupt City of Detroit on April 24 filed a brief in the U.S. Bankruptcy Court for the Eastern District of Michigan opposing a motion filed by the Official Committee of Retirees, arguing that the committee should not be granted leave to pursue limited discovery related to a settlement that was reached but has not been finalized between the city and the retirees because the deadline has passed (In Re: City of Detroit, No. 13053846, Chapter 9, E.D. Mich. Bkcy.).