Former President George H.W. Bush was hospitalized Sunday afternoon for low blood pressure and fatigue, according to his spokesman.

"He will likely remain there for a few days for observation," according to spokesman Jim McGrath on Twitter. "The former president is awake and alert, and not in any discomfort."

Bush was in Maine this weekend to attend an American Legion pancake breakfast in Kennebunkport in honor of Memorial Day.

He tweeted that he "very much" regretted missing the Memorial Day festivities and expressed gratitude to American service members and Gold Star families.

This is the second time in four weeks that Bush, 93, has been hospitalized. The former president was taken to a Houston hospital on April 22 for a blood infection and released after a nearly two-week stay.

That hospitalization came one day after his wife, former first lady Barbara Bush's funeral. Barbara Bush died last month after announcing that she would cease medical treatment for chronic conditions.

The former president was also hospitalized twice last year.