Twitter's offices have been locked and will not reopen until November 21, according to a letter sen by the BBC. The letter from Twitter to its employees does not give a reason for the move.
The message says that all employee access badges have been suspended. It reads "Please continue to comply with company policy by refraining from discussing confidential company information on social media, with the press or elsewhere."
Twitter did not immediately respond to a request for comment from the BBC.
