Police are appealing for help from witnesses over the death of a teenager who plunged from a building while fleeing a gang of youths.
Ahmed Benyermak, 16, was climbing down the outside of the building when he fell, police said.
He may have feared he was about to be attacked with a knife by a hooded bicycle-riding gang.
He climbed down six floors on the outside of the tower block in Hackney, east London.
But when he reached the seventh floor his path was blocked by a metal grille and he apparently lost his footing and fell.
His family said he had been planning to go to Tower Hamlets College next month to study mechanics.
His uncle, Mustapha Benyermak, said: "He was a nice kid, a friendly guy. He didn't get into trouble. He was at home most of the time. He always helped people out if he could."
Ahmed's cousin Samya Riahi, 16, added: "Maybe he was too nice. He kept himself to himself. He didn't get involved in trouble."
Ahmed was one of four children in his family, who are of Moroccan origin. His cousin suggested he may have been thinking of becoming a mechanic.
Police appealed to anyone who saw him fall from the block or events which led up to it to contact them.
