LONDON — Two people were taken to hospital after a fire broke out at the shipyard that produces Britain’s nuclear-powered submarines, but “there is no nuclear risk”, police said on Wednesday.

A “significant” fire broke out at the BAE Systems shipyard in Barrow-in-Furness in north-west England just after midnight, Cumbria Constabulary said.

Police said that two people were taken to hospitals on suspicion of being affected by smoke, and there were no other casualties. People living nearby were advised to stay indoors and keep doors and windows closed.

The 150-year-old shipyard, about 220 miles (350 kilometers) northwest of London, is currently building several nuclear-powered submarines for the Royal Navy. It’s also where a handful of submarines carrying the UK’s nuclear missiles are built.