A 15-year-old boy's face was slashed in Hainault yesterday (October 24).
Met Police officers were called to The Lowe at about 1.35pm, along with paramedics from the London Ambulance Service (LAS).
The teenager was taken to hospital, and his condition was deemed not life threatening.
A 17-year-old boy has been arrested on suspicion of causing GBH. He has been taken into custody.
Anyone with information is asked to call 101 quoting CAD 3386/24Oct, or Crimestoppers on 0800 555 111 to remain anonymous.
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