'Cyanide envelope' mailed to White House

02:54 PM | 18 Mar, 2015
'Cyanide envelope' mailed to White House

WASHINGTON (Web Desk) - An envelope addressed to the White House has apparently tested positive for cyanide, said Sky News.

The letter was received at an off-site mail screening facility on Monday, said the Secret Service, which is responsible for President Barack Obama's security.

Initial biological testing was negative. But the agency says additional testing returned a "presumptive positive" for cyanide.

The sample has been taken to another facility for further testing.

The Intercept news website, which first reported the incident, said the envelope contained a milky substance and was in a container wrapped in a plastic bag.

There were no injuries from the envelope, according to reports.