Former New York mayor Rudy Giuliani is hospitalised in "critical but stable condition", his spokesperson has said.
Ted Goodman did not immediately provide more details about Mr Giuliani's condition or how long he has been hospitalised.
"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," Mr Goodman said in an X post.
Mr Giuliani earned the moniker of "America's mayor" for leading New York City through the aftermath of the 9/11 terrorist attacks on the World Trade Center buildings in Manhattan.
Earlier in his career, he gained notoriety as a Mafia-busting prosecutor whose aggressive use of racketeering laws brought down New York's organised crime families.
He worked as an attorney for US President Donald Trump in his failed efforts to overturn the results of the 2020 election, an effort that led to criminal charges against Mr Giuliani in two US states and a defamation lawsuit from election workers.
He has denied wrongdoing in the criminal cases.
Mr Giuliani has since been disbarred in New York and Washington, DC.
He was previously hospitalised last year following a car crash in New Hampshire.
