A huge fire broke out at BAE Systems’ Barrow-in-Furness nuclear submarine shipyard in the early hours of Wednesday:’, 30 October.
The blaze began at around 12.45am and was ongoing, Cumbria Constabulary said.
Two people have been taken to hospital for suspected smoke inhalation.
Police said there is “no nuclear risk.”
A statement said: “At this time there are no other casualties and everyone else has been evacuated from the Devonshire Dock Hall and are accounted for.”
The facility is home to Britain’s Astute-class submarines and Dreadnought programme.