The New York Police Department and officials from the city departments of Health and Environmental Protection responded to the scene, along with the Office of Emergency Management.
Donald Jr.'s wife, Vanessa, opened the envelope and discovered the powdery substance and note, sources said.
She then dialed 911, saying she was coughing and feeling nauseous.
White House: New Susan Rice Email 'Raises a Lot of Serious Questions'
Comey describe the status of the FBI's relationship with Mr. [Christopher] Steele, or the basis for that status?" they asked. It was paid for by 2016 Democratic candidate Hillary Clinton and the Democratic National Committee, which she controlled.
The US Secret Service, which is charged with protecting members of the president's family, has joined the investigation, said spokesman Jeffrey Adams. Out of caution, officials say investigators will conduct a thorough probe of the event. The apartment may be the home of Vanessa Trump's mother, local news outlets reported.
(Photo by Win McNamee/Getty Images) Donald Trump Jr, his wife, Vanessa, and children depart St. John's Church in Washington, DC, after a service for U.S. President-elect Trump on January 20, 2017. This is the reason why people hate you.
The New York Daily News reported slightly different wording: "You're an terrible person and now you get what you deserve".
Activision Working On Spyro The Dragon Trilogy PS4 Remaster
It's reported that the PS4 Spyro remaster will be available for PS4 with PS4 Pro support later in 2018 . Sane Trilogy Vicarious Visions hasn't shied away from teasing Spyro in its previous remaster .
NYPD later determined that the white powder was harmless. The New York Post reported that the material was cornstarch. The couple has five children; none of the kids were home at the time of the incident. Nonetheless, the letter itself was threatening.
Investigators confirmed that the mysterious white substance inside the envelope was corn starch.
Australia's Domino's Pizza posts stronger interim profit as sales grow
Boston Private Wealth Ltd accumulated 0.03% or 3,772 shares. 639,310 are held by Invesco. 2,826 are held by Bokf Na. Morgan, Mizuho, MUFG, SMBC, Wells Fargo, Scotiabank, BMO Capital Markets, RBC Capital Markets and Morgan Stanley.
Donald Trump Jr. praised first-responders and investigators yesterday thanking them via Twitter "for their decisive action and incredible words of support to my wife and family". "Truly disgusting that certain individuals choose to express their opposing views with such disturbing behaviour".