Northern Ireland winger Keith Gillespie has apologised for being involved in a punch-up with a team-mate on a flight home from Iceland.

The Sheffield United player admitted his bust-up with West Ham defender George McCartney, as the Northern Ireland team headed home from a 2-1 defeat in their Euro 2008 qualifier, was unacceptable and unsavoury.

Former Newcastle United winger Gillespie also revealed he had contacted his international team-mate, a former Sunderland player, to draw a line under the incident.

''It was an unsavoury incident,'' he said.

''It shouldn't have happened. Certainly it won't be happening, as far as I am concerned, again.

''As I said before, I apologise to the management, staff and the fans because it is something that shouldn't have happened. Unfortunately it did.

''Hopefully we can put this to bed and get on with playing football.''

Trouble flared between the two players before their Icelandair flight returned from Reykjavik to Heathrow on Thursday, prompting the Irish Football Association to investigate the incident.

Gillespie, who scored an own goal in the 2-1 defeat which dented Northern Ireland's hopes of qualification for next year's European Championships, said the flare-up was the result of a mix-up.

He said: ''It was really just a misunderstanding over a lost passport.

''George and I had words and there was a coming together but, you know, the whole incident was finished within two to three seconds.

''Players came in and pulled us apart. The incident has obviously been sensationalised somewhat but certainly I don't have a problem with George.

''It was just a total misunderstanding that shouldn't have happened. I've texted George and told him no hard feelings."