Passengers have been led to safety after a Tube train derailed as it approached a station in west London.
Passengers were led to safety after the train derailed
Officers were called at 1227 BST on Tuesday to a west-bound train on the Central Line which derailed near White City station.
"There has been a minor derailment, there are no injuries and officers are on the scene," said a British Transport Police spokeswoman.
The westbound Central line is suspended between North Acton and Marble Arch.
A London Underground (LU) spokesman said the sixth carriage of the train derailed at "relatively low speed".
He added: "All passengers have been taken off the train and there are currently no reported injuries.
"As a precautionary measure, emergency services are on the scene."
A spokesman for the Rail, Maritime and Transport (RMT) union said it was fortunate the train derailed in an area which had a speed restriction.
Tube derailments in 2003
25 Jan: Chancery Lane crash
17 Oct: Minor derailment at Hammersmith
19 Oct: Seven injured at Camden Town
"The fact that the speed restriction has been in place for some time and that there are problems with points in the area underlines the poor state of the track."
In January 2003 a Central Line train derailed and hit a wall at Chancery Lane station in central London, injuring 32 people.
Extensive checks on the fleet of 85 trains meant the line was suspended for months after the crash.
An independent report into the derailment said the crash happened because an earlier incident at Hainault, on the Central Line, had not been understood.
The independent report for LU said inspections after the previous incident failed to identify the gearbox failure which had cased a traction motor to fall off.
In October seven people were hurt when a Northern Line train derailed at Camden Town, in north London.
It happened two days after a Piccadilly line train derailed in west London - no-one was injured.
Private consortium Metronet took over responsibility for maintaining the Central Line in April 2003.
It said the White City train derailed at a set of points undergoing routine maintenance where a 20 mile-an-hour speed restriction was in place.
The RMT wants all Tube maintenance work brought back in-house.