NEW YORK -- An Orthodox Jew who collaborated with his captors in a Nazi concentration camp will be stripped of his U.S. citizenship but allowed to remain in the country under an agreement in which he admits his war crimes, federal officials said yesterday.

The case of Jacob Tannenbaum, 72, of Brooklyn, is believed to be the first deportation case involving of a Jewish collaborator with the Nazis.

Tannenbaum, who lost his wife, child and nine other family members in the Holocaust, must surrender his citizenship papers and passport under the agreement reached with the Justice Department's Office of Special Investigations.

Tannenbaum will remain "a lawful, permanent resident" and will not face deportation proceedings because of illness, but he must submit his medical records and doctors' reports every six months to determine his health status, officials said.

Under the agreement, Tannenbaum "admits he served as a camp capo" at the Goerlitz concentration camp in Poland from about September 1944 to May 1945 and "admits that while serving as the lagercapo, he participated in persecution by brutalizing and physically abusing prisoners," the agreement said.

Tannenbaum has said he became a capo, or inmate overseer of his fellow prisoners, to survive in the camp. He argued he never abused other prisoners.