United States Security, yesterday, intercepted a letter to the White House meant for President Barak Obama, which tested positive for ricin poison.

The US Secret Service said in a public statement that it had acknowledged the letter addressed to President Barrack Obama and it contained ricin, a deadly suspicious substance.

Earlier on Tuesday, United States lawmakers revealed that a letter addressed to Senator Roger Wicker (R-Miss.) had tested positive for the poison.

The Secret Service said the letter was sent to Obama on April 16 and was discovered at a White House mail screening facility.

“The Secret Service White House mail screening facility is a remote facility, not located near the White House complex that all White House mail goes through.”

The agency said it was working closely with the US Capitol Police and the FBI in the investigation.

News of the letters came just days after two bombs exploded at the finish line of the Boston Marathon in a terrorist attack that killed three people and injured more than 170.

Although, government officials have not linked the two events, security has been beefed up since the attacks, with visitors asked to take off their shoes before entering some Senate and House office buildings.


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