A cyber-attack on Twitter platform Tweetdeck has infiltrated several accounts, and re-tweeted garbled code.
The coding vulnerability hit several high profile accounts, including BBC Breaking News and that of Labour leader Ed Miliband.
Tweetdeck initially said the vulnerability had been cleared, but some users reported they were still being attacked.
The service has now been temporarily taken offline.
Tweetdeck, a British company that was acquired by Twitter in 2011, allows users to collate different feeds.
The service has been subject to similar attacks in the past.
James Potter