Twitter Inc. was out of commission for a couple of hours early Sunday for some of the roughly 100 million users around the world.
People who use the San Francisco-based site are used to seeing a picture of a whale on occasion. The whale means the site is too busy to take your tweet.
It was the same effect overnight, but for a difference issue. The home page indicated the site was down for "planned maintenance" but was expected to be back in a few hours.
According to a status website run by the San Francisco-based company, Twitter's hosting provider, NTT America, was to start the maintenance at 2 a.m. EDT Sunday and it was to last about five hours.
Some tweets appeared to start moving again after about 90 minutes but some users were still unable to send messages hours later.
It worked just fine when we checked it just now.