(JTA) — A group of teenagers assaulted 10 Jewish students at a public sports center in Paris.

According to France’s Bureau for Vigilance against Anti-Semitism, several teenagers “of African and North African origins” attacked the group of Jewish 13-year-olds from the Ner HaThorah Jewish school on Thursday. There were no serious injuries.

The attackers asked the Jews to stop “occupying the area,” the report said, called them “dirty Jews” and said “Hitler didn’t finish the job.”

When police arrived, the attackers fled, according to a bureau report published Friday on the French Jewish news site JSSnews.

Parents and pupils said the attack, in the 19th Arrondissement, turned into a fight as the Jewish pupils tried to defend themselves.

The Bureau for Vigilance against Anti-Semitism called on French police to prosecute the attackers.