Bee Gees star Robin Gibb has been taken to hospital with abdominal pains, his spokesperson has confirmed.

The singer fell ill on Sunday and has pulled out of a series of gigs due to take place this month in Brazil.

His spookesman told BBC News: "We are not sure what's wrong with him at this stage and are worried."

Gibb underwent surgery for a blocked intestine last year but had returned to good health following the operation.

"We don't know if it is a recurrence of the previous problem or if it is something else entirely," his spokesman added.

In 2003, his twin brother Maurice died after complications from a twisted intestine.

(by Jason Gregory)