Four people encased their arms in concrete and were arrested for causing a public nuisance after a protest against climate change in Bristol.
Dressed as polar bears, members of the Bristol Rising Tide for Climate Action, lay down across the vehicle entrance to the Royal Bank of Scotland on Monday
Specialist police officers had to cut through concrete to release their arms.
A bank spokesperson said: "We recognise the importance of dealing with the causes of climate change."
Rising Tide said the action was part of a co-ordinated protest around the country.