Deputy Attorney General Rod Rosenstein told reporters Friday that the defendants worked for the GRU, Russia's premier military intelligence agency.
The first indications of the subject matter came shortly before the conference began with reports that a notice posted in the main federal courthouse in Washington, DC, indicated that attorneys from Mueller's Special Counsel's Office and the DOJ National Security Division had visited Friday morning related to a grand jury indictment.
Deputy Attorney General Rod Rosenstein says that Russian intelligence agents stole information on 500,000 US voters after hacking a state USA election board.
The indictments were filed by Special Prosecutor Robert Mueller, who is investing possible collusion between the presidential campaign of President Donald Trump and the Russian spies USA intelligence agencies say interfered with the 2016 election. They also hacked into the computer network of the Democratic National Committee.
"Between in or around June 2016 and October 2016, the Conspirators used Guccifer 2.0 to release documents through WordPress that they had stolen from the DCCC and DNC", the indictment read.
The charges add to an already substantial list of 19 other people and three companies charged in the investigation led by Special Counsel Robert Mueller. The indictment said the Russians adopted false online personas to push divisive messages, traveled to the United States to collect intelligence and staged political rallies while posing as Americans.
The unfolding drama on both sides of the Atlantic reflected how Trump's presidency has been overshadowed by the Mueller probe from its earliest moments and how the investigation frequently tramples the President's attempts to carve out favorable headlines. "When we confront foreign interference in American elections, it is important for us to avoid thinking politically as Republicans or Democrats and instead to think patriotically as Americans".
"It comes just hours after President Trump referred to the Mueller probe, again, as a witch hunt, and just a few days before his meeting with Russian President Vladimir Putin", Tapper said.