The national offices of the Anti-Defamation League in New York and a Jewish day school in Durham, North Carolina received bomb threats from an anonymous caller today.

On Feb. 21, a San Diego-area Jewish community center, the Lawrence Family JCC in La Jolla, was evacuated after receiving a bomb threat via email.

New York City Patch reported that the threat to the ADL’s Manhattan headquarters was called in at about 11:08 a.m. Feb. 22, according to police. Neither the report nor the ADL said whether the building was evacuated.

“While there is no information at this time to indicate that this is more than a threat, we are taking it very seriously,” ADL CEO Jonathan Greenblatt said in a statement. “We are working with law enforcement officials to determine if it is connected to similar threats against Jewish institutions across the country.

“This is not the first time that ADL has been targeted, and it will not deter us in our efforts to combat anti-Semitism and hate against people of all races and religions.”

This morning @ADL_national received a bomb threat. We’re just one of many #Jewish groups that has been targeted. More below. pic.twitter.com/2DI5JUCIY1

— Jonathan Greenblatt (@JGreenblattADL) February 22, 2017

Parents of students at the Lerner Jewish Community Day School in Durham were informed of the threat to the school by a robocall from the school on Wednesday morning, according to reports.

After the La Jolla JCC received a threat early Tuesday morning, the San Diego Police Department swept the building and did not find any explosives. The JCC was reopened by 7 a.m. This is the second time the La Jolla JCC has been targeted in the last month.

There have been more than 70 bomb threats to Jewish institutions around the U.S. so far this year.