© Jonathan Ernst / ReutersDonald Jr. and Vanessa Trump.
According to ABC news, Vanessa Trump opened the letter after it was addressed to Donald Trump Jr and was sent to the couple's apartment on East 54th street in Manhattan.
She reportedly opened the letter just after 10am local time. She and two other people were decontaminated by firefighters at the scene before being taken to hospital for an evaluation.
All of the people appear to be fine, officials said. An investigation has been launched.
This isn't the first time one of President Donald Trump's sons has been targeted with malicious mail. In March 2016 Eric Trump received a package containing a suspicious white substance to his New York address.
One might have to knock off a cookie to acces the info : tribalfusion