Former President Gerald Ford is in the hospital with pneumonia, FOX News has confirmed.

He is said to be doing well and resting comfortably at Eisenhower Medical Center in Rancho, Mirage, Calif., his chief of staff Penny Circle said Monday in a statement.

"Based on his age it is prudent for his initial course of treatment — IV antibiotics — to be done at the hospital," Circle told The Associated Press.

Ford should be released from the hospital on Wednesday or Thursday, she said.

"He's doing very well," Circle said.

When asked if the pneumonia was the result of any lingering effects from a bad cold Ford had last month, Circle would only say, "I don't think so."

No other information will be available until Tuesday, when a press release will be issued, Circle told FOX News. Hospital officials declined to comment.

In December, the former president, who is 92, spent time in the hospital after suffering a "horrible cold" and undergoing routine medical tests.

Ford was president of the United States in the mid-1970s, taking office in 1974 after then President Richard Nixon resigned over the Watergate scandal. Ford led the country for two years before losing the 1976 election to Jimmy Carter.

Doctors say Ford is in good health for his age, though he spent a night in the hospital in 2003 for dizzy spells after golfing in hot weather and suffered two small strokes in 2000 while attending the Republican National Convention in Philadelphia. He was in the hospital for a week after the strokes, but was left with no permanent damage.

Since the death of Ronald Reagan in June 2004, Ford has become the nation's oldest living former president. He lives in Rancho Mirage outside of Palm Springs, Calif.

FOX News' Catherine Donaldson-Evans and The Associated Press contributed to this report.