A package containing 'suspicious white powder' was delivered to the Manhattan DA's office, police say

• White powder was mailed Friday to the Manhattan building where the Trump 'hush money' grand jury sits.

• The grand jury was not in session and the powder was quickly determined to be non-hazardous.

• The powder was contained in an envelope addressed to DA Alvin Bragg, NBC reported.

A package containing "suspicious white powder" was discovered at noon on Friday in the building where a grand jury has been hearing evidence in the Trump "hush-money" investigation led by Manhattan District Attorney Alvin Bragg, officials told Insider.

The package was delivered to the building's mail room, and was non-hazardous, police told Insider.

NBC reported that the letter was addressed to Bragg and said "ALVIN: I AM GOING TO KILL YOU!!!"

The letter was delivered by USPS, Fox News reported.

The grand jury meets Mondays, Wednesdays, and Thursdays, sources have told Insider, and was not in session on Friday. No one was sickened or taken to the hospital; the package was determined to be non-hazardous within three hours, officials told Insider.

"The D.A. has informed the office that it was immediately contained and that the NYPD Emergency Service Unit and the NYC Department of Environmental Protection determined there was no dangerous substance," a DA spokesperson said.

Police said the incident is under investigation.

The apparent threat came as a grand jury is weighing evidence that could lead to an indictment of former President Donald Trump over his alleged role in hush-money payments made to adult film star Stormy Daniels days before the 2016 election. Trump has denied any wrongdoing.

Trump has repeatedly lashed out at Bragg in the past week, calling him a "WOKE TYRANT" and "SOROS BACKED ANIMAL" while encouraging his followers to "take our nation back" as an indictment looms.

On Thursday, Trump posted on Truth Social a link to an article with a photo composite of him holding a baseball bat next to an image of Bragg's head. His Truth post has since been taken down.

On Saturday, Bragg sent his employees an office-wide email promising that, "our law enforcement partners will ensure that any specific or credible threats against the office will be fully investigated and that the proper safeguards are in place so all 1,600 of us have a secure work environment."

Experts on political violence have warned that Trump's words could trigger violence.

Officers with the NYPD and the city Department of Environmental Protection were seen just before 3 p.m. carrying red, hazardous materials bags out of the lower Manhattan office building where Bragg and his team of prosecutors also have offices.

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