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Published 09:32 21 Apr 2016 BST
Updated 09:32 21 Apr 2016 BST

What such an announcement might have been about is unclear, as are McGregor's reasons for hastily getting rid of it.
The tweet followed confirmation that McGregor will not fight at UFC 200 and the news that some bookies have him down as being more likely to embark on a career in WWE than returning to the Octagon.
One thing's for sure, we've certainly not heard the last of this one.Explore more on these topics: