An "incident" at Oakwood Prison near Wolverhampton has been "resolved successfully" according to a spokesman for G4S, the company that operates the facility.
This incident was resolved successfully at 2.10am.
Police and internal investigations will now take place. It would be inappropriate to comment further until these have been completed.
More top news
Welfare reforms do not lead to more people being in work, a new study suggests.
A new vaccine to protect young children from meningitis is to be offered across the UK from today.
Two British journalists arrested on terror charges in Turkey