(JTA) — Three Jewish schools in South Florida were placed on lockdown temporarily after ammunition was discovered on the campus they share with the local Jewish federation.

According to Local10.com, the Jewish Federation of South Palm Beach County released a statement Tuesday saying the Boca Raton schools, which collectively enroll 1,302 students, were locked down “as a preventative security measure,” but local law enforcement found there “was no threat whatsoever to our schools or campus, and the schools are no longer locked down.”

“Authorities believe the situation resulted from criminal activity in an adjacent neighborhood,” the statement from the federation’s president and CEO said.

The three day schools are the Donna Klein Jewish Academy, Hillel Day School of Boca Raton and the Jewish Education Center. Hillel is Orthodox; the other two are unaffiliated.

Police have not determined who left the ammunition on the 100-acre Richard & Carole Siemens Jewish Campus, which also houses preschools, a fitness center, adult day care, low-income housing and special needs programs for children and adults. According to the federation’s website, it is the largest Jewish campus in the United States.

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