Hussain exploded a bomb on the No. 30 bus that exploded in Tavistock Square, killing 13 of the 52 people killed in the suicide bombings, and himself. Investigators found his body and personal effects on the bus. At the age of 18, he was the youngest of the group of four. The other men were Shehzad Tanweer, Germaine Lindsay, and Mohammad Sidique Khan.