Ozzy Osbourne was treated at a Denver hospital for "a minor outpatient procedure" over the weekend before flying to the next stop on his latest tour, his management company said on Sunday.

His ailment was not disclosed, but NBC affiliate KUSA-TV reported on its Web site that Osbourne underwent surgery for a blood clot on Saturday night following a show. He had complained of leg pain for most of the day, KUSA said.

A spokesman for the 58-year-old musician did not immediately reply to an email seeking more information. A statement from Osbourne's management read: "Ozzy Osbourne had a minor outpatient procedure at Rose Medical Center late last night. He was released early this morning and is doing well."

It added that Osbourne is currently in Kansas City, Missouri, where he is scheduled to perform tonight as the headlining act on his annual Ozzfest tour.