A 17-year-old boy has been admitted to hospital with stab wounds.
Police were called at around 3.45pm to reports of a stabbing in Gooseacre Lane, Harrow on Tuesday.
Upon arrival, officers and the London Ambulance Service found a teenage boy in nearby Woodcock Park suffering stab injuries.
He was taken to hospital for treatment, but his condition is not thought to be life-threatening.
Police enquiries are ongoing and no arrests have been made.
Anyone with information is asked to contact police on 101 and quote CAD 4834/13Nov or call Crimestoppers anonymously on 0800 555 111.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here