COPS have identified the Parsons Green terror suspect using CCTV after an IED attached to a timer exploded on a rush-hour Tube injuring 22, sources have said.
The homemade bucket bomb device sent a "fireball down a carriage" as it partially detonated with a schoolboy and pregnant woman among those injured in the terror explosion.
Mayor of London Sadiq Khan announced "a manhunt is underway" as bomb squads and counter-terror cops swarmed on the scene.
He added: "The person or people responsible for this attack will be caught and will be brought for justice."
Police have revealed that the homemade bomb, likened to pressure cooker devices used in 2013's Boston Marathon attack, did not fully detonate.