More than a dozen bomb threats were reported Monday at Jewish community centers throughout the United States and Britain, according to The Washington Post.
The Jewish Federations of North America (JFNA) said that some of the calls were pre-recorded.
Richard Sandler, chair of the JFNA board of trustees, noted that the number of threats was unusually high.
Florida officials said that 450 students and 70 employees were evacuated from the Alper Jewish community campus in the Miami-Dade area around 11 a.m.
Around the same time, a bomb threat was called into the Miami Beach Jewish Community Center, according to ABC affiliate WPLG.
Shortly after noon, a Jewish community center in Tenafly, New Jersey was evacuated.
The calls continued throughout the day with bomb threats in Nashville, Tennessee; Columbia, South Carolina and Rockville, Maryland.
“It’s disturbing,” Elise Jarvis, with the Anti-Defamation League (ADL) told The Washington Post.
Similar threats were reported at Jewish Centers in the United Kingdom as well.
“Unfortunately, such threats are not new to the Jewish community,” said Jonathan Greenblatt, CEO of the Anti-Defamation League.
“While each of these threats must be taken seriously, and excellent preparation is key to a good response, bomb threats are most often not credible and are usually used as scare tactics in order to disrupt an institution’s operations, and to cause fear and panic," he continued.
Greenblatt added that the ADL reached out to Jewish centers across the nation, encouraging to review their security policies.
The Associated Press contributed to this report.