Archaeologists say 12 skeletons found beneath a building site in London could provide evidence of a Black Death burial ground.
The remains were found by teams working on Crossrail - a £15bn project to improve transport links in the capital, including at Farringdon where the bones were found.
Historical records indicate a hastily-built cemetery opened in the area in 1348 as the plague spread across the country.
Up to 50,000 people are thought to have been buried there in less than three years.
Jay Carver, lead Crossrail archaeologist, said: “This is a highly significant discovery and at the moment we are left with many questions that we hope to answer.
“We will be undertaking scientific tests on the skeletons over the coming months to establish their cause of death, whether they were plague victims from the 14th century or later London residents, how old they were and perhaps evidence of who they were. Read more.