Trump has become the first former U.S. president to face criminal charges.
Donald Trump was indicted by a Manhattan grand jury on Thursday, becoming the first former U.S. president to face criminal charges.
It was not immediately clear what the indictment was connected to, or what charges Trump will face. The indictment is under seal.
Trump is expected to surrender in New York City early this week, sources familiar with the matter told ABC News.
Manhattan District Attorney Alvin Bragg's office said in a statement that it has contacted former President Donald Trump's attorney "to coordinate his surrender" for arraignment on a state Supreme Court indictment, noting that it remains under seal.
"Guidance will be provided when the arraignment date is selected," the office said.
In the wake of the indictment, all officers with the New York Police Department have been ordered to show up in uniform Friday morning for deployments around New York City, police sources told ABC News.
There are no credible threats, according to the mayor's office.
The indictment of Donald Trump marks an unprecedented development in the country's history -- the first time a former president has ever faced criminal charges.
Historians say that not since Richard Nixon had there been the real prospect of a commander-in-chief being formally accused of a crime, though Nixon avoided that fate after being pardoned by successor Gerald Ford.
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-ABC News' Tal Axelrod
Republican National Committee Chairwoman Ronna McDaniel called the indictment "a blatant abuse of power from a DA focused on political vengeance."
"When our justice system is weaponized as a political tool, it endangers all of us," she tweeted.
