A swastika was scrawled on the outside of a Rego Park synagogue Tuesday – one of a number of hate crimes that have taken place across the borough in recent days.

The swastika was discovered at the Rego Park Jewish Center, located at 97-30 Queens Blvd., at around 10:15 a.m., according to police and the volunteer group Queens Shmira.

It was scrawled in black marker across a “public property” sign affixed to steps leading up to the synagogue.

Queens Shmira said it became aware of the crime after a resident called its hotline number. The group then notified the NYPD.

The police are now investigating the act as a bias incident, according to a NYPD spokesperson.

Elected officials condemned the hateful graffiti and noted that it is part of a recent wave of racist activity throughout Queens.