At least 13 school North Jersey school districts received bomb threats on Wednesday morning, although several are closed for spring break, according to a report.

The Bergen Record reported Fair Lawn High School, Midland Park Junior/Senior High School and Hawthorne High School all received the calls along with he Leonia High School Annex, Hackensack High School, Garfield High School, Elmwood Park Memorial High School, Hasbrouck Heights High School, Fort Lee High School, Lodi High School, Paramus High School, Dwight Morrow High School in Englewood and Passaic Valley High School in Little Falls.

At least some of the schools have already been deemed safe after sweeps by bomb squads.

Several of the schools were administering PARCC tests this week as well.

For some of the schools it's the fourth threat received recently.

Threats of bombs in backpacks and a mass shooting were called into five districts in November 2014 and again on three occasions during this current school year, according to another report by the Record. After threats on January 19 Sheriff Michael Saudino addressed the media and promised to make arrests, a call was made to Emerson police threatening to set off explosives at his home and warned "there would be a a lot of bodies" found there while demanding $1 million.

A fake Twitter account tweeted at Saudino's real account a threat to shoot the sheriff in the head, according to the earlier report.

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