Multiple fire trucks and men in hazmat suits were spotted outside Donald Trump Jr.’s home in Jupiter, Florida, on Monday evening after he received a letter containing an unidentified white powder inside of it, according to three sources familiar with the matter.

Trump Jr., the eldest son of former President Donald Trump, received the letter and opened the envelope—causing the white powder to fly out, according to one of the sources.

The Jupiter Police Department did not respond to a request for comment.

Ahazmat team on Monday was called to Donald Trump Jr.'s home in Jupiter, Florida, after he said he received a mysterious white powder inside an envelope in the mail, according to reports.

Trump Jr., eldest son of former President Donald Trump, confirmed the reports with conservative media outlet The Daily Caller, saying, "It's just become a little bit too commonplace that this sort of stuff happens."

"It doesn't matter what your politics are, this type of crap is unacceptable," he added.

Former President Donald Trump’s son, Donald Trump Jr., had an unexpected surprise Monday after he was sent a letter containing white powder and a note with a death threat, causing a hazmat unit and firefighters to arrive at his Florida home.