John McCain undergoes surgery for intestinal infection

US Senator John McCain has undergone surgery to "treat an intestinal infection related to diverticulitis," his office said on Monday.

McCain, 81, is in a "stable condition."

"On Sunday, Senator McCain was admitted to Mayo Clinic in Phoenix, Arizona, and underwent surgery to treat an intestinal infection related to diverticulitis," CNN reported, his office as saying, in a statement.

"Over the last few months, Senator McCain has been participating in physical therapy at his home in Cornville, Arizona, as he recovers from the side effects of cancer treatment. He has remained engaged on his work as Chairman of the Senate Armed Services Committee, and has enjoyed frequent visits from his family, friends, staff and Senate colleagues. Senator McCain and his family are grateful to the senator's excellent care team, and appreciate the support and prayers they continue to receive from people all over the country," the statement added.

The Arizona Republican's daughter and co-host of the American talk show "The View" Meghan McCain took to Twitter and underscored her father's "intense grit and determination."

"My father @SenJohnMcCain is in stable condition - he continues to inspire me everyday with his intense grit and determination. Thank you to the doctors at Mayo Clinic in Phoenix and to everyone who is praying for him," she tweeted.

McCain is also combating brain cancer for which he has been undergoing treatment in his home state since late last year.