Two people are trapped and more than 40 people have been injured after a tram overturned in Croydon, south London, according to the fire service.
The Met said the accident, which occured just after 6 am in the morning as a “serious incident”.
Five people were initially trapped after the accident but three were rescued.
The accident involved a vehicle and two carriages and occurred in a tunnel, Transport for London said.
Police, fire and ambulance crews are at the scene and people have been asked to avoid the area.
A spokeswoman for London Fire Brigade said: “A two-car tram overturned. Five persons are confirmed trapped, and 40 persons injured.”
A London ambulance service spokesman said: “We are attending an incident in the Croydon area and have multiple resources on way.”
This is a breaking news story, more follows.