Highland Park police responded to a threatening, antisemitic letter discovered in a mailbox Sunday night.
A hazmat team was present in the 900 block of Marion Avenue.
The letter was sent via the United States Postal Service, according to officials.
“The letter was tested for hazardous material and deemed to be non-toxic by the Hazardous Material team,” according to a news release from police.
Officials confirmed that the FBI and state terrorism officials are involved.
Police asked neighbors to stay away while they investigated.
The city said it strongly condemns antisemitism and supports the Jewish community. They have increased patrols near houses of worship and will continue to do so.
No additional information was immediately available.
