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.
I understand Steven Woolfe is not now being released from hospital but moved to the neurological department.
The Ukip leadership favourite is recovering in hospital after collapsing at the European Parliament in Strasbourg on Thursday.Read the full story ›
Ukip's Steven Woolfe hit his head on a wall during an altercation with fellow MEP Mike Hookem and collapsed shortly afterwards, according to ITV News Political Editor Robert Peston.
Passions were high at a meeting of Ukip MEPs but Mr Woolfe decided against leaving the party, Peston told News at Ten.
"He was called effectively a traitor by Mr Hookem and they decided to take it outside," he said.
"There appears to be some dispute, doubt over whether punches were thrown but everyone says there was an altercation, some kind of a scuffle, he hits his head on the wall and later he collapses."
ITV News' political correspondent Carl Dinnen says a spokesperson for Mr Hookem told him it was "a purely verbal altercation" and no punches were thrown.
Ukip MEP Mike Hookem is understood to be the politician who was involved in an "altercation" with Ukip leadership favourite Steven Woolfe.
Mr Woolfe was rushed to hospital with a suspected brain injury after collapsing in European Parliament earlier.
He has since tweeted he is "sitting up" and is feeling "brighter and happier" but is being kept in hospital overnight for further tests.
Ukip MEP Steven Woolfe has said he is "feeling brighter" after being rushed to hospital with a suspected brain injury.
Mr Woolfe was taken to a Strasbourg hospital on Thursday following reports he was involved in an "altercation" with another party MEP.
Nigel Farage had said that the 49-year-old, a contender for the Ukip leadership, was in a "serious" condition.
But Mr Woolfe later released a statement from hospital, saying: "The CT scan has shown that there is no blood clot in the brain.
"At the moment I am feeling brighter, happier, and smiling as ever."
He said he is being kept in hospital overnight "awaiting secondary tests to make sure everything is fine".
I would like everyone to know that the parliamentary staff, the UKIP MEPs with me and hospital staff have been brilliant. Their care has been exceptional. I am sitting up, and said to be looking well. The only consequence at the moment is a bit of numbness on the left hand side of my face.
MPs have sent their well wishes to Ukip's Steven Woolfe after he was taken to hospital in the aftermath of an "altercation".
Mr Woolfe was taken to a Strasbourg hospital on Thursday and said to be in a "serious" condition.
MPs from across UK political spectrum have taken to Twitter to extend their best wishes.
My thoughts are with @steven_woolfe and his wife and daughter at this anxious time and I wish Steven a speedy and full recovery.
Ukip MEP Steven Woolfe is "getting better", according to a party spokesman.
Mr Woolfe was taken to hospital in Strasbourg in a "serious" condition following reports of an "altercation" between party MEPs.
Ukip leadership contender Raheem Kassem had tweeted that the 49-year-old was in a "life-threatening" condition.
"It looks like he is getting better," the spokesman said when asked about Mr Woolfe's condition.
Ukip's Steven Woolfe is in a "life-threatening" condition following an altercation with fellow party MEPs in Strasbourg.
Mr Woolfe, who turned 49 today, was taken ill after walking out on a vote at the European Parliament.
Woolfe, who declared on Wednesday his intention to run as party leader, was reported by Nigel Farage to be in a "serious" condition upon being taken to hospital.
Fellow leadership contender Raheem Kassem tweeted that he believed Woolfe was in a "life-threatening" condition.
I've just heard Steven Woolfe's condition is life threatening. Please keep him in your thoughts and prayers.
Ukip's Steven Woolfe said he is "brighter and smiling as ever" after he collapsed following an "altercation" in Strasbourg.Read the full story ›