(JTA) — A Brussels high school teacher was summoned to appear before a local school board for telling a Jewish student, “We should put you all on freight wagons.” The incident occurred at the Belgian capital’s Emile Jacqmain school and involved a 16-year-old female student and her mathematics teacher, the La Derniere Heure magazine reported Friday.

The teacher, who was not identified, was summoned to appear before the board following a complaint filed against him for inciting racism and anti-Semitic hatred. The student, according to the report, told the teacher that “one does not joke about such subjects.”

Tens of thousands of Belgian Jews, along with countless other Jews from across Europe, were transported by the Nazis to deaths in cattle and freight wagons.

Four days after the “freight wagons” incident, the teacher said publicly at school, “I did not mean to say it, and I apologized to anyone shocked by it.”

“My feeling is that this teacher meant to say exactly what he said, and that this is yet another example of the anti-Semitism that is making life increasingly difficult for Belgian Jews here,” Joel Rubinfeld, president of the Belgian League Against Anti-Semitism, or LBCA told JTA on Monday.