But his account reappeared shortly afterwards.
For reasons unknown, the official Twitter account of Julian Assange, the leader of disgraced transparency organisation Wikileaks, was been deleted earlier tonight for reasons unknown.
Then at 1.5am (AEDT), he popped up again with a tweet showing a cartoon of Santa making a Wikileaks "good or bad" list.
The mysterious disappearance - and re-appearance - of the account proved even more weird when the U.S. Navy on Christmas morning mistakenly tweeted out Assange's full name, in quotes, and nothing else.
A Twitter spokesperson did not answer questions asking if the account was suspended but pointed to the company's language on how users can deactivate and reactivate their own accounts.
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Its utility does not, however, extend to simply viewing or sharing content from the offending accounts. Facebook announced the tool last month .
An alternative account purporting to belong to Assange claimed Twitter deleted the account as he prepared to break a blockbuster story.
Assange has been holed up at the Ecuadorean embassy in London since 2012, when he sought refuge there to avoid extradition to Sweden on rape charges, which were eventually dropped. The whistleblowing site has also confirmed that Assange is safe and well, despite some Twitter "oddities".
Did they raid him?
Another added: "In less than 24 hours the internet is about go absolutely insane if Julian Assange doesn't show proof of life".