A cordon has been put in place at Earls Lane and the entrance to the Carlisle bus station on Lonsdale Street due to debris falling from the roof of a building in the area.
A Cumbria Police spokesman said: “The bus station has now reopened.
“No one has been injured in the incident.
“The fire service are in attendance assessing the building and Cumbria County Council have also been contacted.”
A Cumbria Fire and Rescue Service spokesman said: “At 13:50 hours two fire engines and the aerial ladder platform attended a dangerous structure on Earls Lane Carlisle.
“Firefighters made The structure safe using the aerial ladder platform and then handed it over to building inspectors.”