Firefighters were called off a bus in south London.
Dramatic footage posted on social media showed Tooting Broadway number 333 at Elephant & Castle on fire on Brixton Hill near the Moorish Road junction on Friday morning.
The driver and 20 passengers left the bus before firefighters arrived, London Fire Department said. There were no injuries and the fire was brought under control within 30 minutes, with a Brixton fire engine at the scene.
The Guardian understands that extreme heat in London was not believed to be the cause of the fire.
Marlon Osborne, bus operations manager at Transport for London, said: “The incident on a bus in Brixton this morning must have been really scary for those involved. Thankfully all the passengers were evacuated and there was no There are no injuries. We are working closely with the emergency services and the operator to urgently investigate what happened.