This is the shocking moment a woman tries to stab a schoolboy with a giant kitchen knife – before his grandma jumps in to save him.
The teen boarded the 133 bus on Boxing Day on Brixton Road at around 12:30pm, with his grandmother.
The suspect, who was already on the bus, approached the victim and produced a large kitchen knife, which she tried to stab him with.
Fortunately, the teen’s grandmother managed to intervene and disarm the suspect. She then got off the bus and ran towards Oval.
The teen suffered minor cuts to his stomach in the shocking attack.
Police described the suspect as an Asian woman likely to be in her 20s.
Anyone with information is asked to contact police on 101 or call Crimestoppers anonymously on 0800 555 111, quoting reference number 199092.