The father of schoolboy Damilola Taylor begged young people to stop the string of killings on the streets of London as he collected a Bafta for a drama about the death of his 10-year-old son.
Scotland Yard said he was the 10th teenager to have been killed in the capital in 2017.
He is yet to be formally identified and a post-mortem examination will take place in due course.
His impassioned plea came shortly after the teenager was killed and two others injured in the latest in a surge of knife attacks in the capital.