A teenage boy was taken to hospital after being stabbed at an address in north-west London.
The 14-year-old was found injured by police and paramedics at a home in Guardian Avenue, Colindale, just before 5.15pm on Friday, March 7.
The boy was admitted to hospital, where his injuries were found to be non-life-threatening. A 14-year-old girl also suffered minor injuries.
A 39-year-old man was arrested at the scene on suspicion of attempted murder and remains in police custody.
A Met Police spokesman said: "Police were alerted at 5.13pm Friday (March 7) by London Ambulance Service to reports of a stabbing in Edgware.
"Officers attended the scene at a property on Guardian Avenue, NW9, where a 14-year-old boy had suffered a knife injury to the head. He was taken to hospital for treatment. His injuries are not said to be life-threatening.
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"A 14-year-old girl also suffered minor injuries in the incident. A 39-year-old man was arrested at the scene on suspicion of attempted murder. He remains in custody.
"Police are not looking for anyone else in relation to the incident. Enquiries continue."