The White House received an envelope this week containing a substance that testing revealed to be cyanide, the Secret Service confirmed Tuesday.¬†“On Monday 3/16/15, an envelope was received at the White House Mail Screening Facility.
Initial Biological testing was negative; however, on 03/17/15, the chemical testing returned a presumptive positive for cyanide,” said Secret Service spokesman Brian Leary in a statement. “The sample was transported to another facility to confirm the results.”¬†Leary said because there is an “ongoing investigation, the Secret Service will have no additional comment.”¬†There were no injuries or exposure concerns for the person at the mail sorting facility who opened the letter, said a law enforcement official.¬†
The envelope was initially reported by the Intercept, which received an internal law enforcement document that alerted staff to the incident.¬†“An envelope containing an unknown milky substance, in a container wrapped in a plastic bag, received at the White House Mail Screening Facility, tested positive for cyanide,” the alert read.¬†According to the Intercept, the alert identified the man listed as the return address on the envelope as having a long history with the Secret Service, dating back to 1995. That history includes an incident in which the man sent a package covered in urine and feces.