A 17-year-old boy has been stabbed to death in a busy part of central London.
Emergency services were called shortly before 2pm on Tuesday, before the teenager was taken to hospital, where he later died.
Scotland Yard said no arrests have been made and they are continuing their investigations at the scene in Edgware Road, near the junction with Church Street in Westminster.
Detective Chief Inspector Andy Partridge from the Metropolitan Police's Specialist Crime Command said the attack took place near a college where "many young people would have been on their break".
Despite the efforts of medics the teenager died in hospital shortly before 7.30pm.
Anyone with information about the killing is asked to contact police on 101 quoting CAD 3755/10Sept or to call Crimestoppers anonymously on 0800 555 111.