NUTLEY — Threats made against two New Jersey public school districts led one of them to cancel classes on Friday.

School districts are on edge all around the state following the shooting at Stoneman Douglas High School in Parkland, Florida, that left 17 students and teachers dead.

A threat on Instagram kept Nutley public schools closed, according to Nutley Police. The content of the video was not disclosed, but police said they are speaking to the individuals in it.

"Preliminarily there doesn’t appear to be an active threat to any of the schools but we must finish this process," police wrote in their Facebook post.

Police asked parents to remain calm as the investigation continued.

According to TAP into Nutley, the video showed a Nutley High School senior at a firing range with some friends, accompanied by the song "Pumped Up Kicks." The 2011 song by the group Foster the People includes lyrics about outrunning bullets from a gun. "All the other kids with the pumped up kicks, you'd better run, better run, faster than my bullet," read the lyrics.

Superintendent Dr. Julie Glazer said in a statement on the district website that she made the decision to "err on the side of safety" and close all schools on Friday.

Jackson Police Captain Steve Laskiewicz, in a post on the department's Facebook page, said his department investigated a rumor on social media that a student posted a list of students he may wish to harm.

"There is no known credible threat regarding any of the township schools at this time and contrary to any rumors being circulated, the department does not have any information that would support students staying home tomorrow," Laskiewicz wrote.

Police already increased their presence at all district schools following the Florida shooting.

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