Twitter was shut down for hours Thursday morning by what it described as an ongoing denial of service attack. In a one sentence statement on its status blog, Twitter said, “We are defending against a denial-of-service attack, and will update status again shortly.” The outage appeared to begin mid-morning, EST, and affected users around the world.
In the early minutes of the outage, we confirmed it in two New York boroughs and received word that it was down in Brazil as well. At that point, Twitter apparently didn’t know what had hit it. (The status blog read, at that point, “Site is down - We are determining the cause and will provide an update shortly.”)