Mr Flanagan’s account tweeted “Sapirse mchugh photo skinny dipping (sp)" at 2.50 am on Monday morning, with the name of former Green Party candidate Saoirse McHugh misspelled.
The tweet has since been deleted and Mr Flanagan has said he believes his account was “compromised” and has contacted Twitter.
Have just changed my password. I believe my account was compromised. I am contacting to twitter to establish what's has happened. Some nasty people out there. Mind yourselves.
— Luke 'Ming' Flanagan (@lukeming) September 28, 2020
Ms McHugh has since said Mr Flanagan made contact with her to explain what had happened and she accepts his explanation, according to the Irish Examiner.
Mr Flanagan has previously campaigned for Ms McHugh during the general election and tweeted in support of her politics.