Two teens were rushed to hospital after a stabbing in Lambeth on Friday.
Police found the first boy, believed to be around 15-years-old, suffering from stab wounds in Strathleven Road after being called to the scene at around 6pm.
The London Ambulance Service rushed the teen to a south London hospital where he remains in a critical condition.
Officers then discovered a second boy, also around 15-years-old, suffering from head injuries in nearby Margate Road.
He was taken to hospital but has since been discharged.
The Met Police says it is keeping an open mind about the motive for the attacks and no arrests have been made.
Anyone with information should contact Brixton CID on 020 8649 2118/2119 or Crimestoppers on 0800 555 111.
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