A 91-year-old Massachusetts man was ordered expelled from America for concealing his role in Germany’s mass murder of Polish Jews during World War II, the Justice Department said.

Vladas Zajanckauskas was found by an immigration judge to have participated in the Nazi “liquidation” of Warsaw’s Jewish ghetto in 1943 that sent thousands of residents to their deaths in concentration camps, the Justice Department said in a statement.

Immigration Judge Wayne Iskra determined Zajanckauskas was “one of the top-ranked” members of a Nazi SS unit that committed “terrible crimes” including rape and murder during the roundup of Jewish residents of the Warsaw ghetto, the Justice Department said. Judge Iskra ordered Zajanckauskas to be sent to his native Lithuania.

His SS unit trained to participate in Operation Reinhard, the Nazi plan to murder all Polish Jews, the Justice Department said. About 40,000 residents were sent to concentration camps and forced-labor camps, including 7,000 who were gassed at the notorious Treblinka death camp, the department said. Thousands of others died in street fighting.

“Vladas Zajanckauskas was an accomplice in Nazi mass murder,” Eli Rosenbaum, the Justice Department’s chief Nazi hunter, said in a statement. “Had he told the truth after the war, he never would have been permitted to enter this country.”

Since its startup in 1979, the Justice Department’s Nazi-hunting unit has won 105 expulsion cases against ex-Nazis who entered America by concealing their role in atrocities during World War II. Another 175 were prevented from entering America after they were placed on a government watch list.

Among those put on the watch list was Kurt Waldheim, the former president of Austria and U.N. secretary-general who died in June at age 88. Waldheim was ordered barred from further travel to America in 1987 following accusations that he participated in the killing of Jews in Yugoslavia.

Zajanckauskas, who lives in the town of Sutton near Worcester, entered the America in 1950 from Austria.