One account, @Dzhokhar_, is a repurposed account that was full of tweets earlier Friday morning.
As he started getting attention, he quickly deleted all of his tweets.
Google cache, however, has a screenshot of how his account looked yesterday.
And there's another fake Boston bombing suspect account that's actually tweeting threats at the Boston Police Department's Twitter account.
Ryan Broderick is a reporter for BuzzFeed News and is based in London.
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