WASHINGTON (AP) — Deputy Attorney General Rod Rosenstein says that Russian intelligence agents stole information on 500,000 U.S. voters after hacking a state U.S. election board. The allegation was part of new charges Rosenstein announced against 12 Russian intelligence officers for hacking offenses during the 2016 presidential election.

The charges are part of the ongoing special counsel probe into potential coordination between the Trump campaign and Russia.

The indictments were announced Friday by Deputy Attorney General Rod Rosenstein as part of the ongoing special counsel probe into potential coordination between the Trump campaign and Russia.

The Russians are accused of hacking into the computer networks of the Democratic National Committee and the presidential campaign of Hillary Clinton.

The indictment — which comes days before President Donald Trump holds a summit with Russian President Vladimir Putin — was the clearest allegation yet of Russian efforts to meddle in American politics. U.S. intelligence agencies have said the interference was aimed at helping the presidential campaign of Republican Donald Trump and harming the election bid of his Democratic opponent, Hillary Clinton.

The indictment lays out a sweeping and coordinated effort to break into key Democratic email accounts, including those belonging to the Democratic National Committee, the Clinton campaign and the Democratic Congressional Campaign Committee.

The indictment also does not allege that any vote tallies were altered by hacking.

Before Friday, 20 people and three companies had been charged in the Mueller investigation. That includes four former Trump campaign and White House aides and 13 Russians accused of participating in a hidden but powerful social media campaign to sway American public opinion in the 2016 election.

Hours before the Justice Department announcement, Trump complained anew that the special counsel's investigation is complicating his efforts to forge a better working relationship with Russia. Trump and Putin are scheduled to hold talks Monday in Finland, a meeting largely sought by Trump.

Trump said at a news conference Friday near London with British Prime Minister Theresa May that he wasn't going into the meeting with Putin with "high expectations."

"We do have a -- a political problem where -- you know in the United States we have this stupidity going on. Pure stupidity," he said, referring to Mueller's probe. "But it makes it very hard to do something with Russia. Anything you do, it's always going to be, 'Oh, Russia, he loves Russia.'"

"I love the United States," Trump continued. "But I love getting along with Russia and China and other countries."