One of the alleged hackers is in Canada and is expected to be arrested soon, according to the report, which cited an anonymous person described as having been briefed on the matter. The other three individuals are currently in Russia, according to Bloomberg's source.
Yahoo declined to comment on the report. The Justice Department, which on Tuesday announced a media briefing for Wednesday morning by the department's national security division, did not respond to a request for comment.
The hacks, each of which was described as the largest cybersecurity breach ever, have been a serious embarrassment for Yahoo, which is seeking to sell itself to Verizon. The turmoil began in September when the troubled internet giant revealed a 2014 data breach in which hackers in 2014 swiped user information from half a billion accounts. A few months later, the company reported a separate hack in 2013 affected more than 1 billion user accounts.
The scandal led Verizon, which had already agreed to acquire Yahoo for $4.83 billion, to secure a $350 million discount on the deal last month.
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