Republic of Ireland manager Martin O'Neill has warned winger James McClean over his use of the social networking site Twitter.

McClean posted a derogatory tweet aimed at a Northern Irish newspaper at the weekend, the latest in a growing line of online misdemeanors from the Wigan Athletic player.

He had previously been banned from using Twitter on two separate occasions by his former club Sunderland, both times coming when O'Neill was in charge at the Stadium of Light, and the 61-year-old admits that he was not happy about having to talk to him about it again.

"I wasn't overly pleased. James seems to enjoy the Twittering and his performance merited one or two tweets from other people saying how we he had done, rather than James getting embroiled again," O'Neill told reporters.

"It all leads to the whole thing again about the tweeting. I think even before I arrived here, there was a matchday ban on tweeting - in fact, it might even have been a matchday minus-one or plus-one, as the case may be, or even a two-day ban. I am just experiencing these things again, so let me have a look.

"I don't want to be a guru over this social media and players. I think there just has to be a bit of responsibility. Sometimes I think the players don't realise, even after all this time - maybe they do, maybe that's my view - they might not realise that this is a public media and anything they say is just picked up."

O'Neill is currently preparing for his second match in charge of Ireland, which comes against Poland in Poznan tomorrow night.