Police are investigating an incident on a London Underground train amid reports of an explosion.
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. Bomb squads, police and fire crews were called to the scene after the explosion which involved a white bucket inside a Lidl carrier bag.
A metro.co.uk reporter at the scene described seeing people with facial burns, adding that they were 'really badly burned' and 'their hair was coming off'.
They said that the rear of the train filled with smoke and people left the train, some panicking, at Parsons Green.
One woman described how she had hurt her legs and had seen a large flame fill the carriage and another woman had ash in her hair.