Police in Linden, New Jersey have heard from dozens of Jewish residents after unknown individuals sent them threatening antisemitic hate mail in the last few weeks.

According to the StopAntisemitism advocacy organization, Jews living in the city were mailed letters with threats such as “We’re not done yet. Hitler was right!”

They denounced the letters, describing being “horrified” upon learning that Jews in the area were being targeted.

“In America 2023, Jews deserve to live safely in their communities,” StopAntisemitism tweeted, tagging the Linden police department and local lawmakers.