A 22-year-old man has died after being stabbed in north-west London.
Police were called to High Road, Wembley, at 12:55 GMT on Monday, where the man was treated by paramedics.
He was taken to hospital but later died. No arrests have been made and inquiries are continuing.
Det Ch Supt Luke Williams said: “My thoughts are with the victim’s loved ones at this unimaginably difficult time. Knife crime has a devastating impact on communities and our officers are here to support local residents with any concerns.”
He added: “Residents can expect to see an increased police presence over the next few days. In the meantime, our dedicated officers are working at speed to piece together this tragic incident.”
Anyone with further information is asked to contact police on 101, quoting 3333/1DEC or anonymously via Crimestoppers on 0800 555 111.