(CNN) -- A package containing the poison ricin and addressed to President Donald Trump was intercepted by law enforcement earlier this week, two law enforcement officials confirmed to CNN.
Two tests were done to confirm the presence of ricin. All mail for the White House is sorted and screened at an offsite facility before reaching the White House.
The FBI and Secret Service are investigating the matter.
Ricin is a highly toxic compound extracted from castor beans that has been used in terror plots. It can be used in powder, pellet, mist or acid form. If ingested, it causes nausea, vomiting and internal bleeding of the stomach and intestines, followed by failure of the liver, spleen and kidneys, and death by collapse of the circulatory system.
CNN has reached out to the White House and Secret Service for comment.
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