WASHINGTON (AP) — A grand jury in Washington refused Tuesday to indict Democratic lawmakers in connection with a video in which they urged U.S. military members to resist “illegal orders,” according to a person familiar with the matter.

The Justice Department opened an investigation into the video featuring Democratic Sens. Mark Kelly and Elissa Slotkin and four other Democratic lawmakers urging U.S. service members to follow established military protocols and reject orders they believe to be unlawful. All the lawmakers previously served in the military or at intelligence agencies.

Grand jurors in Washington declined to sign off on charges in the latest of a series of rebukes of prosecutors by citizens in the nation’s capital, according to the person, who spoke on the condition of anonymity because they were not authorized to publicly discuss the matter. It wasn’t immediately clear whether prosecutors had sought indictments against all six lawmakers or what charge or charges prosecutors attempted to bring.

Grand jury rejections are extraordinarily unusual, but have happened repeatedly in recent months in Washington as citizens who have heard the government’s evidence have come away underwhelmed in a number of cases. Prosecutors could try again to secure an indictment.

The FBI in November began contacting the lawmakers to schedule interviews, outreach that came against the backdrop of broader Justice Department efforts to punish political opponents of the president.

Besides Slotkin and Kelly, the other Democrats who appeared in the video include Reps. Jason Crow of Colorado, Chrissy Houlahan of Pennsylvania, Maggie Goodlander of New Hampshire and Chris Deluzio of Pennsylvania.

Slotkin, a former CIA analyst who represents Michigan, said late Tuesday that she hopes this ends the Justice Department's probe.

“Tonight we can score one for the Constitution, our freedom of speech, and the rule of law,” Slotkin said in a statement. “But today wasn’t just an embarrassing day for the Administration. It was another sad day for our country,” she said.

Kelly, a former Navy pilot who represents Arizona, called the attempt to bring charges an “outrageous abuse of power by Donald Trump and his lackies.”

“Donald Trump wants every American to be too scared to speak out against him,” Kelly said in a post on X. “The most patriotic thing any of us can do is not back down.”

Spokespeople for the U.S. attorney’s office and the Justice Department didn’t immediately respond to requests for comment Tuesday.