Suspicious Envelope Sent to Donald Trump Is Believed to Have Contained Ricin

Two pieces of mail addressed to U.S. President Donald Trump contained a substance suspected to be ricin, it has been reported. The mail that arrived on Monday was connected to similar envelopes previously sent to the Pentagon.

A Secret Service spokesman told CNN: "The envelope was not received at the White House, nor did it ever enter the White House."

It was also revealed earlier on Tuesday that envelopes addressed to Secretary of Defense James Mattis and Chief of Naval Operations John Richardson had also tested positive for ricin but were intercepted before they got into the Defense headquarters.

A source familiar with the investigation told the broadcaster that White House and Pentagon letters were connected.

A Pentagon spokesman, Colonel Rob Manning, said the mail delivery facility is on the Pentagon grounds but not in the main building where the defense secretary is based.

Colonel Manning said all U.S. Postal Service mail received at the Pentagon screening facility was under quarantine and posed no threat to Pentagon personnel.

Ricin is a highly toxic compound extracted from castor beans that can be used in powder, pellet, mist or acid form. If ingested, it causes nausea, vomiting, internal bleeding and death by collapse of the circulatory system.

"It's one of the few poisons that's actually found in significant quantities in nature," Peter Chai, a medical toxicologist at Brigham and Women's Hospital in Boston, told The Verge.

The U.S. Centers for Disease Control and Prevention said there was no known antidote. The most important factor, it said, was getting the ricin off or out of the body quickly and providing medical care to reduce effects of poisoning, such as assisting in breathing or flushing a person's stomach.

A ricin-tipped umbrella was infamously used to kill the Bulgarian dissident Georgi Markov in 1978.

The substance found at the White House is thought to be crude castor bean concoction that could not be technically called ricin until further testing.

The letters had messy handwriting on the envelopes with at least one containing an index card with writing that read "Jack the missile bean" and "Stock powder."

Suspicious Envelope Sent to Donald Trump Is Believed to Have Contained Ricin | U.S.