WASHINGTON — An 18-year-old Israeli-American has been arrested in connection with a wave of threats aimed at Jewish community centers, the FBI confirmed Thursday.

The suspect, who was not immediately identified, was arrested by Israeli police as part of joint investigation with the FBI, federal authorities said.

Investigators believe the suspect is responsible for the bulk of the threats transmitted against Jewish institutions in the past several months.

"Today’s arrest in Israel is the culmination of a large-scale investigation spanning multiple continents for hate crimes against Jewish communities across our country,'' Attorney General Jeff Sessions said Thursday. "The Department of Justice is committed to protecting the civil rights of all Americans, and we will not tolerate the targeting of any community in this country on the basis of their religious beliefs.''

The threats spread fear in communities across the country, prompting some of the targeted institutions to upgrade physical security at community centers and offer personal training to staffers to better protect themselves.