Twitter says it experienced a security breach at 2am Pacific Time on Saturday, as three waves of a malicious computer worm - similar to the Samy one that attacked MySpace not long ago - spread across the microblogging site.
A 17-year-old from Brooklyn took responsibility for the attack, explaining that he did it because he was bored. Just as Twitter claimed it had taken control of the worm, a less-powerful copycat attack was set loose.
Twitter says, "All told, we identified and deleted almost 10,000 tweets that could have continued to spread the worm."