Former Washington Mayor Marion Barry, 72, has been admitted to a hospital and is scheduled to undergo a kidney transplant at Howard University Hospital, a hospital official said.

Ron Harris, a spokesman for Howard University Hospital said Barry was admitted Thursday to prepare for a six-hour surgery scheduled Friday. The organ donor for Friday's scheduled surgery is a longtime female friend of the former mayor.

Last week federal prosecutors asked a judge to send Barry to jail for not filing his 2007 tax return on time. Barry was on probation for failing to file his tax returns on time in the past eight of the nine years. Barry, who has been undergoing four-hour dialysis sessions three times a week, said his health problems distracted him from filing his taxes on time.

Barry is a current District of Columbia City Council member and in 1990 during his third term as mayor he served a six month prison sentence after he was videotaped during an FBI sting operation smoking crack cocaine in a hotel room. In 1994 Barry was re-elected to the mayor's office.