A swastika and the name “Hitler” were found spray-painted outside of an elementary school in the Amityville school system, and police are investigating the bias incident.

A security guard discovered the red spray-painted images at Northwest Elementary School in Amityville between Sunday and Monday morning, Nassau County police said.

The swastika — 3 feet by 3 feet — was on a handball court. The words “Hitler” and “USA” were written on nearby pavement.

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Mary Kelly, superintendent of the Amityville school district, said in a statement: “The district does not tolerate such graffiti or vandalism and takes these matters very seriously. We are fully cooperating with the Nassau County Police Department and their investigation.”

Anyone with information can contact Nassau County Crime Stoppers at 800-244-8477.