A man has been arrested on suspicion of assault after temporarily disrupting the start of a General Synod service at York Minster.
The Church of England said the man, who was held at the back of the Minster before being removed by police, was not a protester.
A man was restrained within yards of the Archbishop of Canterbury the Most Rev Justin Welby and the Archbishop of York Dr John Sentamu as they processed in for the beginning of the Holy Communion service.
A spokesman said two people suffered minor injuries in the scuffle - a member of Dr Sentamu's staff, Dave Smith, who had a bloodied face and a steward who suffered a bump to the back of his head.
"We received a call just after 10 O'Clock with a report of an assault on a male at York Minster.
"We were there within minutes and one male was arrested on suspicion of assault."
The new Undercroft at York Minster, which opens on Saturday 25 May, has been partly paid for by a £10.5m donation by the Heritage Lottery Fund. Spokesperson Fiona Spiers has been checking on progress as finishing touches are made and says the new space is much more inviting than what it replaces.
The Dean of York says she hopes that visitors to the new Undercroft at York Minster will learn something about themselves from it. The Very Rev Vivienne Faull, was only appointed last year, says the complicated nature of the below ground chambers echo the complex history of the building.
The new Undercroft at York Minster tells the story of the building's 2000 year history from the days of the Romans to the present. The contemporary chambers which now fill the below-ground area use the space which dug out during emergency excavations in the 1970s to shore up the susbiding tower.
The team behind the new exhibition describe it as an immersive and interactive journey featuring artefacts never before on public display that will allow visitors to see, touch and hear the building's history.
The land upon which the cathedral now stands has been a centre, military, political, social and theological [for centuries], influencing not only regional but national history. For the first time, 'Revealing York Minster' brings together the archaeological discoveries and the written archives, dating back to the 7th Century. It will provide visitors with an insight into the evolution of the city and York Minster's central role within that, right up to the present day with a glimpse at the people who work being the scenes, making use of the very latest technology.
A new exhibition will show off the 2000 year history of one of our region's most famous buildings for the first time.
Finishing touches are being made to a series of a chambers underneath York Minster.
The displays show the archaeological remnants of buildings that used to stand on the site and use the latest technology to show how they have transformed into the famous building that stands there today.