Government legal officers are investigating Queens Park Rangers midfielder Joey Barton over his tweeting.
The footballer posted a series of messages on the site concerning John Terry, ahead of his trial for allegedly racially abusing Anton Ferdinand, a charge he denies.
The remarks came following Terry's loss of the England captaincy.
After airing his views, he commented: "I'll probably get a letter now from 'the powers that be'.
"If you're reading this don't bother........."
However a spokesman for Attorney General said: "I can confirm the tweets have been brought to our attention and have been viewed."
The Attorney General, Dominic Grieve, is the Government's senior legal officer, and his remit includes ensuring defendants facing criminal allegations receive a fair trial.
Barton has since returned to the site to defend his comments, citing his right to free speech.
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