The Trump Administration denounced the newest round of threats "in the strongest terms", White House spokesman Sean Spicer told a news briefing.
"Staff and visitors have exited the building, and JCC phone lines will be unattended for a short period of time", Shapiro said.
Solomon Schechter Day School's lower school campus, which includes children in kindergarten through third grade, was evacuated after a bomb threat was received by phone about 9:50 a.m., according to the Newton police. The U.S. Justice Department and the FBI announced a civil-rights investigation into the threats, but declined to discuss whether they were coordinated.
Bender, the largest of the D.C. area's three Jewish community centers, has been among the targets before.
Jewish facilities around the country have experienced a rash of bomb threats in recent weeks.
Another wave of bomb threats targeted Jewish community centers Tuesday, with facilities in New York, Florida and Milwaukee ordering brief evacuations and the Anti-Defamation League tweeting several of its offices had gotten threats.
The JCC Association of North America said the threats have been a mix of actual people and robocalls. Seven Anti-Defamation Leagues offices also received threats, according to JTA.
Simpson said police had already increased patrols around synagogues and community centers following threats in other cities.
The Mandell JCC was evacuated once before due to the threat on January 18.
And it isn't just Jewish organizations; a mosque and an Islamic cultural center in Silver Spring received threatening letters last week.
"We are so moved by the outpouring of support from our community, including the handsome, hand-delivered messages of love and hope from children of the Islamic Society of DE hanging around our building", according to the Facebook post.