Update (3/15/17, 11:15 A.M. ET): Four defendants, including two officers of Russian security services, have been charged by the U.S. Justice Department, according to the Associated Press.
The Justice Department is planning to issue indictments today against the suspects in at least one of two hacks, according to Bloomberg. The security breaches affected hundreds of millions of people and forced Yahoo to cut its selling price to Verizon by $350 million, from about $4.83 billion to $4.48 billion.
U.S. officials are reportedly accusing one person who lives in Canada and three people in Russia of participating in the hacks. However, the Canadian is far more likely to face arrest, as Russia has no extradition treaty with the U.S.
Yahoo suffered two major hacks in recent years, but it was not clear whether the suspects are accused of participating in the 2013 or 2014 attack. In the earlier incident, thieves stole about one billion users' email addresses, scrambled account passwords, and dates of birth. The later security breach affected about 500 million people.
Revelations of the security breach caused Verizon to insist on a price reduction for its deal, which included Yahoo assets like its sports and finance websites. The sale was announced in February.
The hacks also cost Yahoo millions of dollars in investigative and legal fees, according to company filings, and management changes. Marissa Mayer said she will not be CEO of the remaining pieces of Yahoo that aren't being sold to Verizon and didn't receive her cash bonus last year during the investigations.