The U.S. Department of Justice announced charges against Russian military intelligence officials on Monday, alleging that theyve been involved in the most disruptive series of computer attacks ever attributed to a single group.

No country has weaponized its cyber capabilities as maliciously and irresponsibly as Russia, wantonly causing unprecedented collateral damage to pursue small tactical advantages and to satisfy fits of spite, John Demers, the Justice Departments top national security official, said in a press conference.

The charges involve alleged attacks on Ukrainian electrical power grids and American businesses, as well as hacking campaigns connected to the 2018 Winter Olympics and the 2017 French elections. The charges do not include allegations of attempts to interfere in the 2020 U.S. presidential election.

President Donald Trump has downplayed the threat that Russia poses to the United States, because Russian President Vladimir Putin backs Trumps re-election. Putin has been supportive of Trump, and the CIA believes he is likely directing efforts to aid Trumps 2020 campaign. U.S. intelligence officials have said that Russia is using a variety of measures to attack Democratic presidential nominee Joe Biden s campaign.