Rudolph Giuliani’s spokesman said Sunday that the former New York City mayor is in critical but stable condition after being hospitalized, without providing specifics about why he was admitted or what his prognosis is.

Ted Goodman, Giuliani’s spokesman, said in a statement that “Mayor Giuliani is a fighter who has faced every challenge in his life with unwavering strength, and he’s fighting with that same level of strength as we speak,” and that Giuliani “remains in critical but stable condition.” Goodman did not say what sent Giuliani to the hospital, how long he has been there, or what doctors expect.

The hospitalization announcement came days after Giuliani told his audience during an episode of his nightly online show that he was having voice issues. As he began “America’s Mayor Live” on Friday, Giuliani said: “My voice is a little under the weather, so I won’t be able to speak as loudly as I usually do, but I’ll get closer to the microphone.”

Giuliani, 81, previously had been hospitalized last September after a car crash in New Hampshire left him with a fractured vertebra and other injuries, according to the Associated Press report.

Giuliani’s public profile, including his post-mayoral political role, has been shaped by events after his eight-year tenure as mayor of the nation’s largest city, a period that included the Sept. 11, 2001, attack and its aftermath. He also became widely known for his leadership after the attacks, and he later sought national office in an unsuccessful run for president.

After his presidential attempt, Giuliani served as an adviser to President Donald Trump. As part of that work, the Associated Press reported, Giuliani became a vocal proponent of Trump’s allegations of fraud in the 2020 election, which was won by Democrat Joe Biden.

Those election-related claims ultimately became part of Giuliani’s legal troubles, including a defamation judgment. Two former Georgia election workers later won a $148 million defamation judgment against Giuliani, and the former federal prosecutor later faced a contempt of court finding and a trial this winter involving ownership of some assets as he sought to address how to handle the judgment, the Associated Press said.

Giuliani later reached a deal that allowed him to keep his homes and various belongings, including World Series rings, in exchange for unspecified compensation and a promise to stop speaking ill of the ex-election workers, according to the Associated Press report.

In the days leading up to his hospitalization, Giuliani’s political presence also continued through social media. The Associated Press report said Trump, writing on Truth Social, called Giuliani “a True Warrior, and the Best Mayor in the History of New York City, BY FAR,” adding that it was “So sad!” that Giuliani was being treated badly by “Radical Left Lunatics” and Democrats while referencing the legal and political disputes around him.

The Associated Press report described Giuliani as a native New Yorker who was elected mayor in 1993 after serving as a high-profile federal prosecutor. It also said he ran for the U.S. Senate in 2000 but abandoned his race against Hillary Rodham Clinton after being diagnosed with prostate cancer, and that he ran for president in 2007 before withdrawing amid concerns about his past positions and questions about his personal life and business ties to the Middle East.

Giuliani later pivoted to political commentary, and after Trump won in 2016, the Associated Press report said Giuliani became a surrogate for Trump’s attacks on Clinton and later traveled to Ukraine to seek damaging information about Biden’s son, Hunter.