Police were called to Seven Sisters Road, N4 at 18:01hrs on Wednesday, 20 May to a report of an assault.
Officers and London Ambulance Service attended and found a man in his 20’s suffering from slash injuries.
He has been taken to hospital where he has received minor injuries.
One man has been arrested on suspicion of grievous bodily harm, he is currently in police custody.
A crime scene is in place while enquiries continue.
Any witnesses are asked to call police on 101 or tweet @MetCC and quote CAD 6048.
Alternatively contact the independant charity Crimestoppers 100% anonymously on 0800 555 111.
If you are worried about someone you suspect may be carrying a knife or other weapon, advice and support is also available through organisations including Knife Free https://www.knifefree.co.uk/get-help-support/ and Fearless: https://www.fearless.org/en.