Two people were hospitalized in northwest England early on Wednesday after a fire broke out at a shipyard used by the Royal Navy.
However, police said there was "no nuclear risk" despite the fire being "significant." Two people were taken to hospital for suspected smoke inhalation.
The force advised people living nearby to "remain indoors whilst emergency services respond to the incident and keep doors and windows closed."
The BAE Systems shipyard in Barrow-in-Furness is currently being used to build the UK's nuclear submarines.
The two people who were sent to the hospital had suffered smoke inhalation. The Cumbria Constabulary told local residents to stay inside and close their windows and doors.
Officers said that everyone else had been evacuated from the Devonshire Dock Hall facility and was accounted for.
