More than 60 threats to Jewish centers across the US, authorities investigating

Threats were communicated to at least 11 Jewish Community Centers today.

Federal authorities are looking into threats communicated to at least 60 Jewish centers around the country this year. The threats started in January and the FBI began investigating later that same month. The threats have come in "different waves," with more threats phoned in to centers today, according to one source familiar with the matter.

"The FBI will collect all available facts and evidence, and will ensure this matter is investigated in a fair, thorough, and impartial manner," the FBI said in a statement. "As this is matter is ongoing, we are not able to comment further at this time."

This year, a total of 69 threats to 54 JCCs have spanned 27 states and one Canadian province and came in four waves: Jan. 9, Jan. 18, Jan. 31 and then today, the JCC Association of North America said.

In today's wave of threats 11 JCCs received bomb threats over the phone, the JCC Association of North America said. All threats were determined to be hoaxes, and all JCCs returned to normal operations, it said.

The threats today included a JCC in St. Paul, Minnesota, a JCC in Albuquerque, New Mexico, and two Jewish centers around Buffalo, New York.

David Posner, director of strategic performance at JCC Association of North America, said that while the JCCs that received the threats have all resumed operations "with a heightened level of security," he added, "we will not be cowed by threats intended to disrupt people’s lives."

"While we are relieved that all such threats have proven to be hoaxes and that not a single person was harmed, we are concerned about the anti-Semitism behind these threats, and the repetition of threats intended to interfere with day-to-day life," Posner said. "Local JCCs serve not just the Jewish community but the entire community. Participants from all different backgrounds come to their local JCCs."

"We look to our political leaders at all levels to speak out against such threats directed against Jewish institutions, to make it clear that such actions are unacceptable and to pledge that they will work with law enforcement officials to ensure that those responsible will be apprehended and punished to the full extent of the law," ADL CEO Jonathan Greenblatt said in the statement.

He later responded to questions about possible anti-Semitic activity saying, "As far as people, Jewish people ... I think that you’re going to see a lot different United States of America over the next three, four, or eight years. I think a lot of good things are happening, and you’re going to see a lot of love."

ABC News' Katherine Faulders and Jennifer Hansler contributed to this report.

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