The U.S. Secret Service is investigating a suspicious substance that prompted a brief evacuation when it was found Sunday evening inside the White House, according to law enforcement authorities.
In a preliminary test, the substance, a white powder, indicated positive for cocaine, according to an official familiar with the investigation and the recording of a dispatch from a D.C. fire crew that responded to the incident.
A spokesman for the Secret Service, Anthony Guglielmi, said the substance is undergoing further testing to determine what it is, and authorities are looking into how it got into the White House. He said the D.C. fire department determined the substance did not present a threat.