Parsons Green: London Underground blast is terror incident
An explosion on a Tube train in south-west London is being treated as terrorism, Scotland Yard has said.
Passengers were injured in the blast at 08:20 BST at Parsons Green station on the District Line.
Pictures show a white bucket on fire inside a supermarket bag, but do not appear to show extensive damage to the inside of the carriage.
Eighteen people had been taken hospital, the London Ambulance Service said in a statement.
The Metropolitan Police said it was too early to confirm the cause of the fire and the station, which is above ground, has been cordoned off.
