WASHINGTON (AP) _ The Justice Department is trying to strip U.S. citizenship from a former Michigan tool and die maker it says was a Nazi SS concentration camp and inmate transport guard during World War II.

An attorney for the man, Ferdinand Hammer, 73 of Sterling Heights, Mich., called the charges ''totally false.''

In a complaint filed Tuesday in U.S. District Court in Detroit, the department's Office of Special Investigations, which hunts Nazis in this country, moved to strip Hammer of his U.S. citizenship.

The complaint said Hammer concealed his 1944-45 service as a concentration camp guard and as a guard of prisoners on transports and his service in SS Death's Head Battalions when he applied to immigrate into the United States in 1955 and when he applied for citizenship in 1963.

Hammer's attorney, William E. Bufalino, said, ''We categorically deny the charges. They are totally false and malicious.''