Security camera footage from the Greenpeace office in Murmansk - where campaigners and lawyers are working to free the Arctic 30 - shows six men in balaclavas jumping the fence and breaking into the grounds of the shared building.

A mock cage was stolen. It was going to be used in a public protest against the continuing detention of the Arctic 30, who have been held for 30 days and are charged with piracy, following a peaceful protest against Arctic drilling.

Full video here.