Anthrax letter hoax targets Trump's daughter-in-law
Donald Trump Jr's wife was taken to a New York City hospital as a precaution yesterday after she opened an envelope addressed to her husband that contained an unidentified white powder, police said.
A preliminary test indicated the substance was not dangerous.
Vanessa Trump (40) opened the letter addressed to the president's son yesterday morning at their midtown Manhattan apartment. She called 911 and said she was coughing and felt nauseous, police said.
The Trump Organisation did not immediately respond to a request for comment.
Detectives from the New York Police Department's intelligence division and Secret Service agents are investigating.
Vanessa Trump, a former model, and Donald Trump Jr have five children, none of whom were home at the time of the incident.
In March 2016, police detectives and FBI agents investigated a letter sent to Donald Trump Jr's brother, Eric, that also contained a white powder that turned out to be harmless.
Envelopes containing white powder were also sent to Trump Tower, which served as Mr Trump's campaign headquarters, twice in 2016.
Hoax attacks using white powder play on fears that date to 2001, when letters containing deadly anthrax were mailed to news organisations and the offices of two US senators.
Those letter attacks killed five people.