An immigration judge in Boston has ordered the deportation of a 92-year-old retired factory worker because of his role in the Nazi destruction of the Warsaw Jewish ghetto in 1943, federal prosecutors said Thursday.

Judge Wayne R. Iskra ordered on Tuesday that Vladas Zajanckauskas be removed to his native Lithuania because he was in a notorious Nazi unit that took part in the brutal killing of the ghetto in Poland, Assistant Attorney General Alice S. Fisher for the Criminal Division said.

Zajanckauskas' lawyer, Thomas Butters, did not immediately return a call seeking comment.

The deportation order comes more than two years after a federal judge in Boston revoked Zajanckauskas' U.S. citizenship, ruling he lied when he denied involvement in the murders.

Zajanckauskas denied he was in Warsaw at the time and said his involvement with the Nazis was limited to working the bar at one of their camps in Poland.

But U.S. Justice Department prosecutors said he was recruited as a guard in a unit called the "Trawniki men" that helped the Nazis capture and kill Jews. The Nazis killed thousands and burned down the ghetto, street by street, after the Jews resisted attempts to deport them to death camps.

Zajanckauskas emigrated from Austria in 1950 and became a naturalized U.S. citizen in 1956. Zajanckauskas said he never told immigration officials about his Trawniki service because he thought it would jeopardize his chances of getting into the United States.