It is understood the 57-year-old man was starting his shift this morning when he became unwell.

He was treated at the scene by paramedics before being taken by ambulance to Victoria Hospital in Kirkcaldy.

Police Scotland confirmed he later died in hospital.

A police spokesman said: “Police Scotland were contacted after a 57-year-old man took unwell on the Queensferry Crossing around 9am on Monday.

“He was taken to Victoria Hospital, Kirkcaldy, where he later passed away.

“Inquiries into the circumstances surrounding the death are ongoing and a report will be sent to the procurator fiscal in due course.”

A Transport Scotland spokesman said: “Emergency services attended the site this morning after a colleague had taken ill.

“The incident is understood to be unconnected to work activities and further details are not available at this time.”

Around 1300 workers are employed on the £1.35 billion bridge across the Firth of Forth, which is due to open to traffic in May.