A sprawling investigation unfolded Wednesday as authorities scrambled to respond to a series of suspicious packages addressed to the homes of two former presidents, the offices of CNN and a former chair of the Democratic National Committee.

A grand jury in the special counsel probe has returned the indictment of 12 Russian intelligence officers for hacking-related offenses in the 2016 election.

The DNC filed a lawsuit against the Russian government, WikiLeaks and the Trump campaign, and its associates, arguing the parties conspired to influence the 2016 presidential campaign.