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:
A spokesperson for Crossrail said:
A spokeswoman for the London Ambulance Service said:
The London Fire Brigade said: