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Cyanide-laced envelope mailed to White House

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Posted at 8:50 PM, Mar 17, 2015
and last updated 2015-03-18 15:12:59-04

An envelope laced with cyanide was mailed to the White House, the Secret Service revealed 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 to CNN.

The envelope contained an "unknown milky substance" inside a container and plastic bag. There are no known injuries or exposures, CNN reports.

The incident was first reported by The Intercept. The envelope included a return address to a man who had previous incidents with the Secret Service dating back to 1995.

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Gavin Stern is a national digital producer with the Scripps National Desk.