Former New York City Mayor Rudy Giuliani, a noted oheiv Yisroel and staunch supporter of Israel, has been admitted to the hospital and is in critical condition, according to a statement released Sunday by his spokesman.

Ted Goodman said the 81-year-old is currently listed as critical but stable. No details were provided regarding the cause of his hospitalization.

“Mayor Rudy Giuliani is currently in the hospital, where he remains in critical but stable condition,” the statement said. “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. We do ask that you join us in prayer for America’s Mayor – Rudy Giuliani.”

Giuliani served as mayor of New York City from 1994 through 2001.