School officials say antisemitic symbols were discovered in a classroom at Nyack High School.

The superintendent of Nyack Public Schools sent a letter to families Thursday, saying the symbols were found at the end of the school day. It’s unclear where in the building the incident occurred.

The superintendent said the district stands against all acts of hate, antisemitism, and bias. Clarkstown police have been notified and are working with school leaders to address the situation.