Former President Jimmy Carter has canceled his Washington, D.C. book tour stop, according to the bookstore at which he was scheduled to appear.

Politics and Prose in Northwest Washington announced that the 39th president would not attend the event, planned for Wednesday, "due to health concerns after a brief hospital visit in Cleveland."

Carter, who turns 86 on Friday, was hospitalized in Cleveland Tuesday after developing an upset stomach aboard a flight to the city where he had planned to sign books.

His new book is titled "White House Diary." Carter told President Obama in a phone conversation Tuesday that he was feeling better and plans to resume his tour Wednesday. 

But the Carter Center said Wednesday that the ex-president is scheduled to remain in the hospital under observation during the day.

Politics and Prose said that the D.C. event has not been rescheduled.