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CCTV shows the sickening moment a gang of thugs repeatedly stamp on a man's head at a London tube station, leaving him with permanent brain injuries.
Ali Ali, Gessica Goti, Mohamed Abdulle, 22, and Fiona Abdillahi, 18, launched a brutal attack on two 40-year-old men at Oxford Circus Tube station.
Goti, 22, hit one of the men on the platform, who pushed her back, before Ali smashed him over the head.
Ali, 20, hit him with a large glass bottle. When the victim collapsed and fell to the floor, the group began kicking and stamping on his head.
The shocking attack is just the latest ultra-violent incident in London, where even experienced detectives say they are shocked by the growing ferocity of murders and assaults in the city.