Updated: 09/11/16 : 12:55:40Printable Version
There has been "some loss of life" and dozens of people have been injured after a tram overturned in south London, police have said.
British Transport Police (BTP) said it was "too early to confirm numbers" following the derailment in Croydon just after 06:00 GMT.
A number of people were freed but it is believed two people remain trapped.
The cause of the crash is unclear, with investigators from the Rail Accident Investigation Branch at the scene.
London Ambulance Service said 51 people had been taken to St George's Hospital in Tooting, south London, and Croydon University Hospital.
St George's said it was treating 20 people, including four who are seriously injured.
The overturned tram remains on its side next to an underpass and appears to have derailed where the track branches.
Robin Smith, assistant chief constable of BTP, said: "A number of people have been taken to hospital with injuries and sadly it looks as though there has been some loss of life.
"It is too early for us to confirm numbers but we are working hard to assess the ongoing incident and we are continuing to focus on recovery efforts."
Local resident Hannah Collier said: "I was in bed watching the election when I heard a big crash, which I thought was the wind.
"Then I heard people shouting and then the emergency services arriving.
"Later I saw at least one person being brought out on a stretcher."