A student who was dragged from his bike by a gang of thugs outside a Tube station and stabbed in the chest has died in hospital, police said today.
Hussein Ahmed, 19, who was thought to be studying at Uxbridge College, was attacked near South Harrow station.
His family, from Edgware, had maintained a bedside vigil in hospital but allowed his life-support machine to be turned off yesterday. He was the 12th teenager to be stabbed to death on the streets of London this year and the second this month.
The Metropolitan police today said its investigation had become a murder inquiry as it appealed for witnesses. Four men, aged in their late teens and early 20s, have been bailed until early December after being arrested on suspicion of attempted murder.