Ukip MEP Mike Hookem has admitted having a "scuffle" with Steven Woolfe yesterday but said "no punches were thrown."
Hookem, who was widely accused of being involved in the incident which left Woolfe in hospital, also said "there was no face slapping" and it was simply "two people grappling".
He said he did not injure Woolfe and "there was no indication of him hitting his head on metal, windows or anything else."
Woolfe was left seriously injured by the incident in Strasbourg but has since recovered, although he is still in hospital.
Hookem, a former royal marines commando known for his outspoken views on Brexit and Islamic State, had previously denied involvement.
Nigel Farage condemned the incident yesterday, and is believed to have visited Woolfe in hospital.
Woolfe announced his intention to run for the Ukip leadership earlier this week, following the shock resignation of Diane James, and has been installed as one of the favourites.