The Charleston Police Department's bomb unit and Charleston Fire Department's hazmat unit responded to a suspicious package at Holy City Law, an attorney's office on 102 Broad Street, around noon Tuesday.
Officials say tests at the scene revealed a "minuscule amount" of a white powder substance found in an envelope was not hazardous, and investigators are working to identify the source.
Broad Street between King and Meeting streets were closed to traffic while police investigated, and was reopened by 3:15 PM.
Holy City Law is the practice of Charleston area attorney Jason F. Taylor, who has filed as a candidate for Charleston City Council's 3rd District seat in the upcoming November 2019 election.
City of Charleston spokesman Jack O'Toole issued a statement later on Tuesday that the substance found did not test positive for narcotics:
Due to a miscommunication at the scene, initial reports indicated that the substance tested positive for narcotics. This was incorrect. Due to the trace amounts recovered, the substance could not be identified with certainty, but it did not contain narcotics, explosives or biohazardous materials, and was reported to be non-hazardous.