Panic set in Sunday evening at the White House following the discovery of an unknown substance in the West Wing by members of the Uniformed Division of the Secret Service.

TheBlaze reported that precautionary closures were implemented while DC Fire and EMS investigated.

A firefighter with the department's hazardous material team radioed the results of a field test around 8:49 p.m., noting, "We have a yellow bar saying cocaine hydrochloride," reported the Washington Post.

An official familiar with the investigation confirmed to the Post that the transmission was indeed from the White House and that the preliminary test had turned up a positive result for cocaine.

United States Secret Service Chief of Communications Anthony Guglielmi indicated that "an investigation into the cause and manner" is under way to determine how the substance entered the White House.

DC Fire and EMS told TheBlaze the investigation is being handled by the Secret Service.

According to Guglielmi, the alleged cocaine was found by Secret Service members while conducting routine rounds through the executive mansion.

Authorities have sent the sample to a lab for additional tests.

President Joe Biden was not in the White House at the time of the brief evacuation, as he and first lady Jill Biden had left for Camp David Friday, reported Newsweek. Hunter Biden and his son Beau apparently joined the president for the weekend getaway.

Whoever misplaced the alleged cocaine might take solace in Hunter Biden's story of recovery.

The first son was kicked out of the Navy Reserve for cocaine use and told the New Yorker that he turned up for at least one Burisma board meeting high on the illicit substance.

A 2016 police report indicated that Hunter Biden, who referred to himself in his memoir as a "functioning addict," returned a rental car in Arizona that contained "a small ziplock bag with a white powdery substance inside" along with a cocaine pipe, reported the Washington Examiner.

In a 2018 relapse, Hunter Biden noted he "used [his] superpower — finding crack anytime, anywhere."

Despite his difficult, prison-free journey to recovery, Hunter Biden has enjoyed the support of the president, who maintains he is "smartest guy" he knows.

TheBlaze has reached out to the Secret Service for comment and is awaiting a response.