RALEIGH (AP) ― Evangelist Billy Graham was alert and resting comfortably Wednesday evening after being admitted to a hospital for the treatment of pneumonia, doctors said.

The 92-year-old Graham arrived Wednesday morning at Mission Hospital after he suffered a health episode overnight that included sweating, coughing and breathing difficulty, Graham spokesman A. Larry Ross told The Associated Press on Wednesday. “But he was never in distress or an acute situation,” Ross said.

“Throughout his stay, he had remained alert and in good spirits and with his humor intact,” Ross said. “He signed his own admission papers.”

For six decades, Graham led a worldwide crusade-based ministry that packed stadiums with believers and allowed him to counsel every U.S. president since Harry Truman.

Testing suggested he was suffering from pneumonia, and diagnostic tests showed his heart was normal.

Dr. Shaw Henderson, a pulmonologist, said Graham was being treated with antibiotics and was “clinically stable,” according to a statement from the hospital.

Graham’s primary physician, Dr. Lucien Rice, said in the statement that no date had been set for Graham’s release, but that he “is resting comfortably and is fully alert.”

Age-related conditions such as macular degeneration and hearing loss have kept Graham at his home in Montreat in western North Carolina in recent years, Ross said. But he said Graham has remained in good health overall.

Franklin Graham, who heads relief agency Samaritan’s Purse, along with the Billy Graham Evangelistic Association, is in North Korea through the end of the week, spokesman Todd Shearer told the AP. He’s monitoring his father’s health but doesn’t plan to return home early at this point, Shearer said.

Graham rarely appears in public now, but he did come out in December for a visit from former President George W. Bush at Graham’s namesake library in Charlotte. Graham, who was in a wheelchair, hugged Bush before leaving the former president and former first lady Laura Bush in the library book store for a book signing.

In October 2008, Graham was hospitalized after he tripped and fell over one of his dogs.

Earlier that same year, Graham had elective surgery on a shunt that controls excess fluid on his brain.