Seven people have died and dozens more have been injured after a tram overturned in London.
People were trapped inside and more than 50 were taken to hospital after the derailment in Croydon just after 06:00 GMT.
The tram driver, 42, from Beckenham, has been arrested on suspicion of manslaughter.
British Transport Police said they were investigating whether he fell asleep.
The Rail Accident Investigation Branch (RAIB) said the tram was travelling at a “significantly higher speed than is permitted”.
The police have set up a number – 0800 0560154 – for friends and family to call for information.
Image copyright GETTY IMAGESDeputy Chief Constable Adrian Hanstock said: “We can confirm that at least seven people have lost their lives as a result of this incident.
“Our officers will continue to work tirelessly throughout the evening to formally identify them and provide care and support for their families.”
