Vanessa Trump, the wife of the president's eldest son, Donald Trump Jr., was taken to a hospital Monday after being exposed to a suspicious white powder found inside a letter she had opened, according to New York officials.
“The substance had arrived by mail and it was addressed to Donald Trump Jr.,” New York Police Department spokesman Carlos Nieves said.
Vanessa Trump opened the envelope at about 10 a.m. A hazmat crew arrived shortly after and began decontaminating the couple's apartment.
Police deemed the powder as non-hazardous, but it wasn't clear what the substance was, so officials sent it to a lab for further testing.
Why is white powder suspicious?
In 2001, envelopes laced with anthrax, a white powder, were sent to media outlets and government officials. Five people died from exposure to the toxic chemical.
Why did Vanessa Trump go to the hospital?
Vanessa Trump, a mother of five, reportedly complained of nausea after being exposed to the powder, according to Reuters.
Two others, including Vanessa Trump's mother who didn't complain of nausea, were inside the apartment at the time.
They were all transported to New York Presbyterian-Weill Cornell Medical Center strictly as a precaution, the New York City Fire Department said.
It's not known if the third person was one of the Vanessa Trump's children.
There are no indications of injuries, according to police.
Ivanka Trump sent well wishes to her sister-in-law in a tweet.
What did the Secret Service say?
"The Secret Service and our law enforcement partners in New York City are investigating a suspicious package addressed to one of our protectees received today in New York, New York," the agency said in a statement. "This is an active investigation and we cannot comment any further."
President Donald Trump's personal attorney, Michael Cohen, also issued a statement after the incident.
"How disturbed must a person be to do what they did to a mother of five children?'' Cohen asked. "This dangerous and reckless act goes beyond political differences."