New York/Presbyterian Medical Center

Ed Koch celebrates at the renaming of the Queensboro Bridge in his honor at The Water Club Restaurant - New York, NY - May 19, 2011 (credit: JP Yim/Getty Images)

Former NYC Mayor Ed Koch Expects To Be Released From Hospital Friday

The 87-year-old was admitted to the hospital and underwent a blood transfusion Tuesday morning after he began feeling weak over the weekend while staying with friends in North Carolina, a spokesperson said.