UPDATE: According to West Palm Fire Rescue spokesman Allan Ortman, the powder found at the Palm Beach County Courthouse was not dangerous.
According to Palm Beach County Sheriff's Office spokesperson Teri Barbera, some sort of white powder substance was discovered by the third floor entrance of the Palm Beach County Courthouse.
West Palm Beach Fire Rescue is investigating and testing the substance.
There are no evacuations at this time, but people are not being allowed on the third floor while the investigation is ongoing.
More information will be added to this story as it becomes available.