An investigation was under way today after a London Underground train derailed leaving more than 30 people needing hospital treatment.
The doors were ripped away and glass showered passengers who were thrown about the carriages as the train slid along the tunnel wall.
The RMT union claimed the accident on the Central Line train, packed with 800 passengers, was caused by a motor falling from a carriage after faulty bolts came loose.
The transport union also claimed that a Tube driver had reported a fault with the train earlier to Underground bosses. Passengers reported screeching and banging from beneath the Central Line train in the minutes before the near-disaster.
London Underground bosses warned that the incident would disrupt Central Line services for three days.
Police and London Underground bosses ruled out terrorism, sabotage or vandalism as a possible cause of the accident and said a full investigation was under way at the station.
London Underground said: "We are carrying out a full investigation into this event.
"That will include a full review of any discussions between the train driver and Central Line control."
The train slewed off the line at Chancery Lane just before 2 p.m. yesterday, forcing the final few carriages into a wall and mounting the platform.
PA