A man was stabbed in Acton Lane, Harlesden, last night.
Police were called at 8.30pm by London Ambulance and the injured 25-year-old was taken to a north London hospital with a head injury and stab wounds.
His condition is not thought to be life threatening.
Brent Police CID remained on the scene today and a house has been boarded up.
No arrests have been made.
Anyone with information should call 020 8733 3159.