Bomb threats were made Tuesday against at least 11 Jewish Community Centers and institutions across North America, as well as four offices of the Anti-Defamation League, the Jewish Telegraphic Agency reported.

These are the first threats made against Jewish targets in the United States since Juan Thompson was arrested on Friday for calling in bomb threats to eight JCCs and the Manhattan office of the ADL. Thompson is believed to have made the threats in order to harass a former girlfriend. Authorities say that Thompson is not responsible for the majority of the threats made against Jewish institutions nationwide.

Since January 9, over 100 Jewish American institutions have received bomb threats. While no explosives have been found in any of the facilities threatened to date, the calls cause significant disruptions due to mandatory evacuations.

The Secure Community Network, which is affiliated with Jewish Federations of North America, reported that JCCs in Wisconsin, Maryland, Oregon, Florida, Alabama, and at least two community centers in New York were targeted as of midday Tuesday. The threats, which were conveyed by a combination of phone calls and e-mail messages, were also directed toward Canadian JCCs in Toronto and London, Ontario.

Chicago’s NBC affiliate reported that a threat was made against a local Jewish day school, while the ADL said that its national office in New York and its offices in Washington D.C., Boston, and Atlanta were also targeted.

“This is not ‘normal.’ We will not be deterred or intimidated,” Jonathan Greenblatt, CEO of the ADL, said in a statement. “It is time for action, and we call on the administration and Congress to take concrete steps to catch those threatening the Jewish community.”

“The protocols and processes that these institutions have in place have gone smoothly,” said Paul Goldenberg, director of SCN. “Our constituents and members have remained safe.”

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