FBI says it will investigate DNC hack

The Federal Bureau of Investigation said on Monday that it was investigating the nature and scope of a cyber intrusion at the Democratic National Committee disclosed last month.

"A compromise of this nature is something we take very seriously, and the FBI will continue to investigate and hold accountable those who pose a threat in cyberspace," the FBI said in a statement.

The hack, which has been linked to Russian groups, led to the publication of thousands of internal DNC emails. The leak revealed that several key members of the organization had unfavorable attitudes towards the campaign of Bernie Sanders.

DNC Chair Debbie Wasserman Schultz resigned Sunday over her role in the incident, effective after the Democratic National Convention concludes later this week.

Robby Mook, Clinton's campaign manager, has suggested that the Russians behind the hack were working to promote Donald Trump's candidacy by undermining the Democratic Party. Trump has expressed positive views toward Russia and President Vladimir Putin multiple times throughout his campaign.