Update May 23rd: Police have arrested Joseph Arrison, 33, in connection with antisemitic graffiti spray painted on a Philadelphia Red Cross headquarters; more here.

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Philadelphia Police are investigating after they say someone spray-painted swastikas on the American Red Cross building in Center City. The four pillars in front of the building are now patched up.

The American Red Cross tells Fox 29 they discovered the anti-semitic graffiti Sunday morning in front of their office at 23rd and Chestnut Street and believe it happened overnight. So far, no arrests have been made.

In a statement, the American Red Cross said they were "both saddened and disappointed" to discover the graffiti. "The graffiti was extremely insensitive and does not reflect the open and inclusive values and Fundamental Principles of the American Red Cross," the statement read.

Police say they believe the same vandal also hit a nearby construction site.