A political event being hosted by Broad City’s Ilana Glazer at a historic Brooklyn synagogue in Prospect Heights, Brooklyn was canceled after horrid, malevolent graffiti was found inside, according to the New York Post.

Police found anti-Semitic messages scrawled in the stairwell of Union Temple on Thursday night that also included “Die Jew Rats We Are Here” and “Jews Better Be Ready,” according to Slate. They were written less than a week after a gunman killed 11 people during a shooting at a Pittsburgh synagogue.

The event was scheduled to take place at 8 p.m. on Thursday night, but Glazer came out 30 minutes later to tell the crowd it would be canceled. The writer and actress planned to interview journalist Amy Goodman, and New York state Senate candidates Andrew Gounardes and Jim Gaughran as part of her Generator Collective series.

"Unfortunately, after waiting for over an hour to enter the auditorium, we were notified that some emboldened bigot had covered the walls of the Jewish temple that was housing the event with anti-Semitic symbols and slurs," Instagram user @shelbyyq wrote under a video of Glazer talking to the crowd. "Organizers felt unsafe and uncomfortable carrying on with the event, and rightfully shut it down."

So far no arrests have been made related to the graffiti.