Ukip MEP Steven Woolfe was punched in the face, new medical evidence suggests.
Sources told ITV News that "bruises consistent with a punch" were found by a team of independent experts.
Mr Woolfe was involved in an altercation with fellow Ukip MEP Mike Hookem in Strasbourg on Thursday.
Mr Hookem "absolutely" denies being responsible for Mr Woolfe's injuries and claims he acted in self-defence during a "scuffle".
Ukip MEP Steven Woolfe will be moved to a neurological department following a brain scare, ITV News understands.
The 49-year-old leadership candidate was rushed to a Strasbourg hospital on Thursday after allegedly being hit by fellow Ukip politican Mike Hookem - something the latter denies.
Woolfe was initially treated by medics after at the European Parliament before a more serious head injury was ruled out.
On Friday, Woolfe was released from hospital and moved to a neurological department, ITV News believes.
Sources told ITV News that "bruises consistent with a punch" were found by a team of independent experts.
Mike Hookem insisted he acted in self-defence during a "scuffle" with Ukip leadership favourite Steven Woolfe.
As Ukip and the European Parliament investigate the 'altercation' between Steven Woolfe and Mike Hookem, what could the repercussions be?