Donald Trump’s daughter-in-law Vanessa Trump has been rushed to hospital after opening an envelope containing an unidentified white powder, police have said.
Vanessa Trump, 40, opened the letter, which was addressed to her husband Donald Trump Jr., according to investigators.
Her mother Bonnie Haydon handled the letter, which was posted to her apartment, before passing it on to her daughter, according to the New York Post.
A preliminary test of the substance indicated that it was not dangerous, New York officers said, but Mrs Trump was taken to hospital as a precaution.
The New York Police Department (NYPD) told the BBC that Mrs Trump did not appear to be physically affected by the white powder.
She called 911 and said she was coughing and felt nauseous after opening the envelope at her Manhattan apartment, police said.
Mrs Trump and two others at the scene were reportedly decontaminated by firefighters before being taken to hospital as a precaution for evaluation.
Following the incident, Ivanka Trump tweeted: “Thinking of @MrsVanessaTrump & wishing I was by her side today. No one deserves to be frightened this way. There is no excuse.”
Detectives from the NYPD intelligence division and Secret Service agents were investigating the incident.
In March 2016, police and FBI agents investigated a threatening letter sent to the Manhattan apartment of Donald Trump Jr.’s brother Eric that also contained a white powder.
The contents were later discovered to be harmless. Envelopes containing white powder were also sent to Trump Tower, which served as Trump’s campaign headquarters, twice in the same year.