Jim Brown, Muhammad Ali

In this Sept. 27, 2014, file photo, Muhammad Ali is shown before the Ali Humanitarian Awards ceremony in Louisville, Ky. A family spokesman for Muhammad Ali says the boxing great has been released from a hospital after recovering from a severe urinary tract infection. Ali spokesman Bob Gunnell says the three-time world heavyweight champion is back home after being released from an undisclosed hospital Tuesday night, Jan. 6, 2015. (AP Photo/Timothy D. Easley, File)

LOUISVILLE, Ky. (AP) — A spokesman for boxing great Muhammad Ali says the former heavyweight champion is being treated in a hospital for a respiratory issue.

Spokesman Bob Gunnell said Thursday that Ali is being treated by doctors as a precaution. He says that the 74-year-old is in fair condition, and that a brief hospital stay is expected.

He declined to say where Ali is hospitalized or when he was admitted.

Ali has battled Parkinson’s disease for years.