The vandalism happened sometime over the weekend. Staffers at the office at 155 N. Market in downtown Wichita found the hate symbols Monday morning and quickly had them cleaned up.
A spokeswoman in Roberts' Washington D.C. office said it wasn't the first time the Wichita office had been vandalized. A building maintenence worker said back in September someone sprayed black paint and swastikas all around the exterior.
The FBI will investigate because the office is considered a federal location.