CCTV has captured an attempted arson attack on a bus travelling around the Croydon area.
The police described the two suspects as "teenage white boys".
Four seats were damaged, as the pair attempted to set them alight.
No one was injured in the incident and only one other passenger was on board at the time.
It happened on Sunday, 6 September 2015 on a route T31 bus travelling on Field Way, Croydon at about 7.45pm.
Police believe the suspects to be aged from about 14 to 16 years of age.
Anyone with information can contact DC Alastair Middleton on 07909 877121 or Crimestoppers anonymously 0800 555 111, quoting reference 3826214/15.