'I'm going to kill you': White powder in envelope marked for 'Alvin' discovered at Manhattan DA's office

A white powder was found in an envelope addressed to "Alvin" in the mailroom at 80 Centre Street, where a grand jury has been hearing evidence in the case of former President Donald Trump, according to ABC News.

The powder was determined to be non-hazardous, but the intent behind sending it is unclear, sources told ABC News.

According to NBC News, the envelope also contained a letter with the message: "ALVIN: I AM GOING TO KILL YOU!!!!!!!!!!!!!”

Republicans have accused Manhattan District Attorney Alvin Bragg of waging a "politically motivated prosecution" of former President Donald Trump.

Bragg is investigating a $130,000 payment to pornographic actress Stormy Daniels in the weeks leading up to the 2016 presidential election.

IN OTHER NEWS: Racist man arrested for tormenting neighbors in years-long spree that involved ‘a large cutout of a Sasquatch’

The payment was allegedly made to stop her from going public about a liaison she says she had with Trump years earlier.

Trump's ex-lawyer-turned-adversary Michael Cohen, who has testified before the grand jury, says he made the payment on his then boss's behalf and was later reimbursed.

If not properly accounted for, the payment could result in a misdemeanor charge for falsifying business records, experts say.

That might be raised to a felony if the false accounting was intended to cover up a second crime, such as a campaign finance violation, which is punishable by up to four years behind bars.

Trump insists he is innocent, and has escalated his attacks on Bragg in recent days. Early Friday morning, the former president warned of "death & destruction" if he were to be charged with a crime.

With additional reporting by AFP