Bee Gees Singer Robin Gibb Hospitalized for Stomach Pain

10/14/2011 4:47 AM PDT

Bee Gees
co-founder Robin Gibb is hospitalized in the U.K. ... where he's being treated for severe abdominal pain and inflammation of the colon.

Gibb's rep released a statement ... saying the singer was admitted yesterday and is undergoing tests. He also calls the situation a "difficult time."

The rep adds, "Robin would like to thank all his friends and fans for their good wishes and sends them his love."