Law enforcement officials are looking for the person or people who sent a poison-filled package to US President Donald Trump.
According to Newser, the package never even made it as far as the White House mailroom.
It was flagged at an off-site sorting facility.
The package contained ricin.
It's a toxic compound made from castor beans that can be fatal if inhaled or ingested.
Ricin has appeared in political terror schemes before, in the US and elsewhere.
