A 15-year-old boy and girl were found with stab wounds.
Police were called to Station Road in Harrow yesterday at 9.20pm to reports of a stabbing.
Met officers and London Ambulance Service Attended.
The boy was discovered with stab wounds alongside a 15-year-old girl who received superficial cuts.
Both of the victims injuries have been deemed as non life threatening.
Both of those injured are believed to be aged 15 and received their injuries after being assaulted by a group in Harrow Recreation Ground.
No arrests have yet been made and enquires continue.
This comes a few hours after a man in his mid-40s was attacked and pronounced dead on Northfolt Road in Harrow.
Anyone with information is asked to contact police on 101 and quote CAD 7972/3Apr or call Crimestoppers anonymously on 0800 555 111.
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