A suspicious package was received at the Young Israel Synagogue in Bal Harbour, Florida, on Monday morning, containing anti-Semitic rhetoric and threatening photos.

The package was delivered by USPS, and contained a DVD, a photo of someone pointing a gun and pages filled with anti-Semitic writing, sources told COLlive.

“It must be known that the Jewish community will NOT cower in fear. We stand strong, united, and proud,” Bal Harbour Mayor Gabriel Groisman tweeted.

Surfside and Bal Harbour Police are investigating.

This incident occurred only a day after a shooting outside the Young Israel of North Miami Beach on Sunday evening. A Jewish man was shot 6 times in front of the Synagogue by a man who drove by in a black sedan. Police are still searching for the shooter.