Letter sent to White House tests tentatively for cyanide
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WASHINGTON (AP) – The Secret Service says an envelope addressed to the White House tentatively tested positive for cyanide.
The letter was received at an off-site mail screening facility Monday. Initial biological testing was negative.
The agency said additional testing Tuesday returned a “presumptive positive” for cyanide.
The sample was taken to another facility for further testing.
The Secret Service is responsible for President Barack Obama’s security.
The agency said the investigation into the letter will continue and it will have no additional comment on the matter.