Cheryl Yurkovich, media releations director at The Detroit Medical Center, confirmed Saturday evening that Mrs. Parks had been hospitalized to undergo some tests, but declined to provide further information, including which facility she was in.
"At her request, no further information is being released," Yurkovich said.
Citing information obtained from Mrs. Park's niece, WDIV-TV in Detroit reported that Mrs. Parks was taken to Harper Hospital, part of the DMC, after suffering injuries in a fall Saturday morning.
Test were conducted to see if she had a heart attack or a stroke, both were negative, WDIV reported.
Messages left with Mrs. Parks' attorney and personal assistant were not immediately returned Saturday evening.
Mrs. Parks is best known for refusing to give up her seat on a Montgomery, Ala., bus in 1955 to a white man. Her arrest touched off the Montgomery bus boycott.
Mrs. Parks, 85, has lived in Detroit since 1957.
In 1987, she founded the Rosa and Raymond Parks Institute for Self Development. Its main program is an annual "Pathways to Freedom" bus tour, which takes students to civil rights sites around the United States.