Dozens of rabbis demonstrated in Amsterdam on Wednesday night calling for the release of three Israeli teenagers who were kidnapped in the West Bank.

The rabbis, members of the Young Rabbis Forum of the Rabbinical Center of Europe, gathered on Wednesday at the Hollandsche Schouwburg, a former theater turned commemoration site because the Nazis used it as a central dispatch point of Jews to death camps shortly after their invasion of the Netherlands in 1940.

General Director of the European Jewish Association Menachem Margolin said that hundreds of local Amsterdam residents joined in the demonstration to identify with the teens.

Also attending was executive director of the Netherlands-based organization Christians for Israel, Roger van Oordt.

The rabbis carried a large banner reading #Bring Back Our Boys and a Dutch-language translation in reference to Gil-ad Shaar, 16, Naftali Frankel, 16, and Eyal Yifrach, 19, who were last seen on June 12 at a hitchhiking post near the Etzion Bloc of settlements south of Jerusalem.

The gathering in Amsterdam was part of a number of activities by Jewish communities in Europe on behalf of the three youths.

France’s Consistore, the Jewish community’s body responsible for religious services, called on congregants to convene at Paris’s Grande Synagogue de la Victoire on Thursday for a mass prayer for the youths’ safe return and instructed synagogues throughout France to say a special prayer for their release.

In Munich, emissaries of the Torah MiTzion movement organized a rally featuring similar signs at the city’s Marienplatz, NRG news reported.