Chicago authorities were investigating a potential hate crime after a local synagogue was vandalized on Saturday.

The Chicago Loop Synagogue was plastered with swastika stickers and had a window broken.

Lee Zoldan, president of the the Chicago Loop Synagogue, told NBC News Chicago that construction workers across the street witnessed the incident.

A black SUV reportedly pulled up and a man got out with what seemed to be an axe and smashed the synagogue's window.

The suspect then plastered a few swastika stickers on the outside of the building.

The Archbishop of Chicago condemned the attack, tweeting that "We stand with our Jewish brothers and sisters as they worship at Chicago Loop Synagogue this Sabbath. Hate will not prevail."

Police have not yet made any arrests in the incident.