A 17-year-old boy was slashed with a sword as he walked home from college in West Ham, East London.
The victim was chased into a cul-de-sac when he fell over and was attacked with the deadly weapon by a gang.
He was taken to a nearby hospital where his cuts required stitches.
Detective Constable Georgina Hebron said: “This is a nasty unprovoked attack on a teenager who was walking home from college. We are appealing for anyone who may have seen the attack to come forward.”
Police have released CCTV of four men wanted in connection with the attack.
Yet another horrific attack on a young person in the capital city.
This is now the horrendous reality for so many youngsters growing up in England.