Sir Mick Jagger has said he is "devastated" to let down fans after the Rolling Stones were forced to postpone a tour of the US and Canada while the frontman seeks medical treatment.
The singer, 75, has been told by doctors that he cannot go on tour at the moment but have advised that he is expected to make a full recovery.
No further details of his condition were given.
A statement from the group said: "Unfortunately today the Rolling Stones have had to announce the postponement of their upcoming US/Canada tour dates - we apologise for any inconvenience this causes those who have tickets to shows but wish to reassure fans to hold onto these existing tickets, as they will be valid for rescheduled dates, which will be announced shortly.
"Mick has been advised by doctors that he cannot go on tour at this time, as he needs medical treatment.
"The doctors have advised Mick that he is expected to make a complete recovery so that he can get back on stage as soon as possible."
Sir Mick added: "I'm so sorry to all our fans in America & Canada with tickets. I really hate letting you down like this.
"I'm devastated for having to postpone the tour but I will be working very hard to be back on stage as soon as I can. Once again, huge apologies to everyone."
The band were due to kick off the US and Canada leg of their No Filter tour at the Hard Rock Stadium in Miami, Florida on April 20, finishing at the Burl's Creek Even Grounds in Ontario, Canada, on June 29.
