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Director of the Anti-Defamation League Jonathan Greenblatt speaks on stage during the 2015 Concordia Summit at Grand Hyatt New York, Oct. 2, 2015. Greenblatt tweeted Wednesday that the ADL headquarters had received a bomb threat. Getty

Just one day after President Donald Trump condemned a wave of anti-Semitic incidents across the U.S., including the desecration of a Jewish cemetery in a St. Louis suburb and a string of bomb threats against Jewish community centers, the headquarters of the Anti-Defamation League received a bomb threat, the group's CEO tweeted Wednesday.

Jonathan Greenblatt, the CEO of the ADL, tweeted the anonymous bomb threat occurred Wednesday morning at the group's headquarters in New York City. On Tuesday, the ADL called for Attorney General Jeff Sessions to open an investigation into bomb threats targeting Jewish institutions.

"Threats like these are a body blow to the very fabric of our society," said a statement accompanying a petition asking for the investigation on the ADL website. "Whenever a bias-motivated crime is committed, an entire community is left victimized, vulnerable, fearful, isolated and unprotected by the law."

President Trump addressed the wave of anti-Semitic incidents Tuesday at the National Museum of African American History and Culture in Washington.

"The anti-Semitic threats targeting our Jewish community and Jewish community centers are horrible and painful and a very sad reminder of the work that must be done to root out hate and prejudice and evil,” Trump said. It was the first time the president has forcefully denounced anti-Semitic incidents since taking office. During a press conference last week, Trump dodged a question about anti-Semitic incidents from a Hasidic reporter, instead choosing to speak about himself.

"I am the least anti-Semitic person that you've ever met in your entire life," he said.

The president's denunciation of the anti-Semitism on Tuesday followed calls for the president to address the incidents, calls that included a tweet from former campaign foe Hillary Clinton earlier in the day. Speaking on CNN Tuesday, Greenblatt called Trump's comments a display of "moral leadership that has been lacking for months."