Reuters
More than 100 classified documents detailing U.S. national security secrets have been leaked on social media, purportedly exposing crucial intelligence on Ukrainian military operations in a breach that could be a boon to Russia.
The documents, purported to have come from within U.S. military and intelligence agencies, have been circulated on Twitter, 4chan, and Telegram, where they were spread by pro-Kremlin commentators, according to The Wall Street Journal.
The Pentagon acknowledged on Thursday that officials were looking into the leak, which experts say may be one of the most damaging breaches in decades.