Police are investigating an "incident" on a District Line underground train at Parsons Green, south-west London. Officers and ambulance service are on the scene following reports on social media of an "explosion" in a carriage.
The blast left a number of passengers with facial burns, it has been reported. Scotland Yard said it was aware of the incident at Parsons Green station and officers were in attendance. The authorities said there was no service between Earls Court and Wimbledon on the District Line.