Russian spies hacked into the computer system of the Democratic Party and obtained a complete dossier on Republican presidential candidate Donald Trump, the Washington Post reported Tuesday citing party officials.
A Russian embassy spokesman in Washington told the newspaper it had no knowledge of such intrusions.
The government hackers had access to internal communications such as emails and chats, according to the party officials and security experts. Exactly what Trump information was tapped could not be immediately determined.
US officials have said they have seen signs of attempted hacking of computer networks belonging to Republican Party groups as well as the Trump and Hillary Clinton campaigns throughout the 2016 election season. Details of those intrusions were not immediately available.
Speaking to broadcaster NBC, Democratic Party head Debbie Wasserman Schultz said the two "very aggressive, very sophisticated" espionage networks were detected on the party's computer system in April.
The private contractor CrowdStrike conducted forensics on the Democrats' system and could see that the opposition research files had been targeted, Wasserman Schultz said.
She said she found it "understandable" that the Russians were targeting the Trump files given that real estate mogul is "the most dangerous" presumptive presidential nominee and has made "extreme and disturbing" statements.