Donald Trump Jr and his wife Vanessa have praised emergency services for their quick response after the mother-of-five was hospitalized following a terror scare when she opened a letter with a white powder inside.
The frightening episode happened after 10am on Monday when Vanessa, 40, opened the letter addressed to the president's son at her mother's midtown Manhattan apartment.
She called 911 immediately and said she was coughing and felt nauseous.
The former model, her mother Bonnie Haydon and another person were decontaminated and taken to New York Presbyterian-Weill Cornell Medical Center as a precaution, according to NY Fire Department officials.
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Vanessa Trump was hospitalized on Monday after opening a letter with a white powder inside of it. She is pictured above with her husband, Donald Trump Jr, in April 2016
Vanessa praised the NYPD, NYFD and Secret Service in a tweet on Monday evening
Don Jr also thanked emergency personnel for making a 'rough day manageable'
Police later said the substance wasn’t dangerous and law enforcement sources told the New York Post that the powder turned out to be cornstarch.
Officially though, an NYPD spokesman wouldn't say what the powder was but said it was 'deemed to be non-hazardous' and is being taken to their lab for 'further analysis'.
Vanessa praised the NYPD, FDNY and Secret Service on Monday evening.
'Thank you so much for all the help today in NYC! I appreciate all the quick response to make sure that I was safe!' she tweeted.
Her husband also thanked the personnel for making a 'rough day manageable'.
A special thanks today to the great men & women of the @NYPDnews @FDNY @SecretService @NewYorkFBI and the Joint Terrorism Task Force for their decisive action and incredible words of support to my wife and family. Their professionalism under pressure made a rough day manageable.'
In an earlier tweet, Don Jr said he was disgusted and disturbed by the incident.
'Thankful that Vanessa & my children are safe and unharmed after the incredibly scary situation that occurred this morning.
'Truly disgusting that certain individuals choose to express their opposing views with such disturbing behavior,' Donald Jr tweeted after the incident.
Donald Jr tweeted that he was glad that his wife and children 'are safe and unharmed'
Members of Don Jr and Vanessa Trump's Secret Service detail were spotted leaving their home just hours after the scare happened on Monday
A Hazmat truck is seen outside Vanessa Trump's parent's apartment building on Monday
The NYPD's intelligence division and the Secret Service are investigating the incident.
'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. This is an active investigation and we cannot comment any further,' the Secret Service said in a statement.
Donald Jr's sister Ivanka sent her thoughts from Washington, DC.
'Thinking of @MrsVanessaTrump & wishing I was by her side today. No one deserves to be frightened this way. There is no excuse,' she tweeted
The view outside NewYork-Presbyterian/Weill Cornell Medical Center where Mrs Trump was taken on Monday
The daughter-in-law of President Trump and former model is pictured above in new York City on January 31
Sister-in-law Ivanka Trump sent her thoughts from Washington, DC after the incident on Monday
President Trump's personal lawyer, Michael Cohen, weighed in with a statement of his own.
'How disturbed must a person be to do what they did to a mother of five young children? This dangerous and reckless act goes beyond political differences,' Cohen said according to the Post.
The incident recalled the scary days after 9/11 when letters containing lethal anthrax spores were sent to the offices of several politicians and media outlets - resulting in five deaths.
Donald Jr, 40, is the eldest son of President Trump, followed by his sister Ivanka, 36; brother Eric, 34; half-sister Tiffany, 24; and half-brother Barron, 11.
As a child of the president, Donald Jr and his family were assigned a Secret Service detail when his father was elected.
He voluntarily gave up his Secret Service protection in September, wanting more privacy, but his detail was reinstated about a week later.
Donald Jr and his wife are pictured above with four of their five children voting on election day in 2016
Don Jr and model Vanessa Hayden married in August 2005 at his father's Mar-a-lago estate in Palm Beach, Florida.
The pair were actually introduced by the future president when Don Jr attended a fashion show with his father the previous year. Having met at the beginning of the show, Trump Sr was said to be so smitten with Vanessa that he re-introduced his son to her at intermission.
'Donald comes back up to me again, "I don't think you've met my son Donald Trump Jr," Vanessa told The New York Times in 2006. She responded: 'Yeah, we just met, five minutes ago'.
The couple finally started a relationship after being introduced a third time at a party by a mutual friend. Trump Jr, then 26, proposed to her in front of a jewelry store, complete with paparazzi, with a $100,000 engagement ring, which he is said to have wrangled for free in return for publicity.
They have five children, daughters Kai, 10, and Chloe, three; and sons Donald III, eight, Tristan, six, and Spencer, five – all of whom regularly feature on Don Jr's Instagram account.
Since his father and sister Ivanka moved to Washington, DC., Donald Jr and his younger brother Eric have taken over control of their family company.
Last year, Eric was sent a threatening letter with a white powder in it to his New York City apartment as well.