The Anti-Defamation League (ADL) has issued a Security Advisory to Jewish institutions across the United States following a series of bomb threats to Jewish community centers in at least 16 states.

In a press release, ADL says it is closely monitoring the situation and has been in touch with federal and local law enforcement across the country.

Although the threats do not appear to be credible, ADL urges all communal institutions to take these threats extremely seriously.

Some community centers have been evacuated out of an abundance of caution.

ADL has received reports of bomb threats at Jewish community centers in New York, New Jersey, Ohio, Florida, Massachusetts, Maryland, Michigan, Minnesota, Delaware, Connecticut, Alabama, California, Maine, Tennessee, South Carolina, Missouri and Texas.

“Although so far these threats do not appear to be credible, we are recommending that Jewish communal institutions review their security procedures and remain in close contact with law enforcement,” said ADL CEO, Jonathan A. Greenblatt.

“While each incident needs to be taken seriously and investigated closely, thus far we are not aware of any of these threats being substantiated.”

He said ‘’federal authorities and local police departments should be commended for their rapid response to these incidents. We remain in close contact with law enforcement and are offering our support and resources to local community centers.”

ADL also issued an additional Security Advisory detailing reports from several companies and business around the country which have receive anti-Semitic faxes in recent days. That alert reminded all institutions of the importance of protecting their computer networks and systems.