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Individual "believed to be responsible for most of the threats" against Jewish organizations arrested.

U.S. federal authorities have been investigating a surge of threats against Jewish organizations, including more than 100 bomb threats in separate waves over the past three months targeting Jewish community centers (JCCs) in dozens of states. Israeli police said the teenager is believed to be responsible for most of the threats, though the precise number was not immediately clear. Authorities also said he was responsible for a previous bomb threat against a Delta Airlines flight in January 2015 at New York's John F. Kennedy International Airport.

The Federal Bureau of Investigation, which took part in the probe, confirmed the arrest but declined to offer further details.

The threats forced the evacuation of many JCCs, including some with day care and school facilities for infants and young children. Coupled with other incidents such as the desecration of Jewish cemeteries, they have stoked fears of a resurgence in anti-Semitism in the United States.

In a statement, the president of the JCC Association of North America said JCC leaders were "troubled" the teenager appears to be Jewish.