A Crossrail worker - believed to be in his 20s - has been taken to hospital with serious burns after he cut through a cable at a central London site, causing an electrical explosion.
A loud noise was reported at the building site near the junction of High Holborn and Drury Lane.
Nearby roads were closed off causing delays.
A Metropolitan Police spokesman said:
Police were called at approximately 12.45 today following reports of an electrical explosion on a building site at the junction of High Holborn and Drury Lane.
Officers, London Fire Brigade and London Ambulance Service are in attendance. One man believed to be in his 20s is being treated at the scene.
The Health and Safety Executive will be notified.Road closures remain in place.
A spokesperson for Crossrail said:
At around 12.40 today a construction worker engaged on the Crossrail project undertaking utility excavation in the High Holborn area struck a below ground electrical cable.
London Ambulance Service, London Fire Brigade and the Metropolitan Police all attended the scene and the worker was taken to hospital. The Health and Safety Executive has been informed.
A spokeswoman for the London Ambulance Service said:
We were called at 12.43 to Drury Lane at High Holborn to reports of an incident.
We sent an ambulance crew, duty officer, two cycle respondants, a motorcycle respondant, our hazordous area response team and London Air Amulance team in a car to the scene.
Our staff treated a man believed to be in his 30s for burns and they have taken him to the Royal London Hospital by ambulance.
The London Fire Brigade said:
Firefighters were called to reports of a minor explosion, believed to have been caused by a workman cutting through an electrical cable, on High Holborn, close to Museum Street in WC1 today. One man sustained burns and was taken to hospital by the London Ambulance Service.
The Brigade was called at 1243 and the Brigade’s involvement was over by 1314.
There were three fire engines and 15 firefighters from Euston, Soho, and Clerkenwell fire stations at the scene.”