The packages were sent to U.S. Defense Secretary James Mattis and the Navy's top officer, Admiral John Richardson, Fox News reported, citing a Pentagon spokesperson. "Those envelopes are now undergoing further testing". The mail initially caused suspicions because it contained a sticky substance, per a defense official.
Ricin is a poison found naturally in castor beans.
Neither envelope entered the Pentagon.
The FBI has seized two envelopes delivered to the Pentagon that are suspected of containing ricin, according to CNN. He said the packages had been found Monday at a delivery facility that is on the Pentagon grounds but not inside the main building that includes the offices of the defence secretary. "As this is ongoing, we will have no further comment".
Charlottesville, a year later: "Four California men, all alleged members of an organized hate group, were arrested Tuesday and charged with violating a federal rioting law in connection with the violent, 2017 white-supremacist rally in Charlottesville, authorities said".
Unintentional exposure to the substance, the government says, is virtually impossible.
It can be used in powder, pellet, mist or acid form.
In April 2013, letters containing ricin were sent to President Obama, Sen.
Notable Ricin poisonings include the deadly poisoning of Georgi Markov, a Bulgarian writer and journalist who was living in London in 1978.