A senior MP has been asked to leave the Tory conference after a "totally unacceptable" incident involving a clash with security staff, a party spokesman said.
Sir Geoffrey Clifton-Brown was involved in what some witnesses described as "an actual punch up" inside a secure zone at the conference centre.
The Cotswolds MP had attempted to bring his fiancee, who did not have the relevant pass, into the International Lounge at the Manchester event when he was stopped by a member of staff.
He is understood to have remonstrated with the member of staff, at which point security personnel intervened.
A Conservative Party spokesman said: "The incident was totally unacceptable.
"Geoffrey has been asked to leave Conference and we are establishing all of the facts to see if further action is necessary.
"We will always adopt a zero tolerance approach to any inappropriate behaviour towards our hardworking staff."
A staff member guarding the door of the International Lounge said the incident was sparked by a disagreement.
"It was a small misunderstanding," the man said.
The "misunderstanding" led to a lockdown of some areas, including the press room, at the Manchester Central Convention Centre for around 20 minutes.
Sir Geoffrey said earlier: "I've got nothing further to say about it. I don't want to comment on it, really."
Greater Manchester Police said in statement: "At around 1.45pm on Tuesday 1 October 2019, an attendee to the Conservative Party Conference attempted to enter the International Lounge area of the conference without the relevant pass.
"Security staff intervened and resolved the situation without any breach of security occurring."
The incident has echoes of the notorious "Plebgate" scandal involving Tory former chief whip Andrew Mitchell who clashed with police at the gates of Downing Street in 2012.
