The four suicide bombers were later identified as:
Mohammad Sidique Khan: aged 30. Khan detonated his bomb just after leaving Edgware Road tube station on a train travelling toward Paddington, at 8:50 am. He lived in Beeston, Leeds, with his wife and young child, where he worked as a learning mentor at a primary school. The blast killed seven people, including Khan himself.
Shehzad Tanweer: aged 22. He detonated a bomb aboard a train travelling between Liverpool Street station and Aldgate tube station, at 8:50 am. He lived in Leeds with his mother and father, working in a fish and chip shop. Eight people, including Tanweer, were killed by the explosion.
Germaine Lindsay: aged 19. He detonated his device on a train travelling between King's Cross and Russell Square tube stations, at 8:50 am. He lived in Aylesbury, Buckinghamshire, with his pregnant wife and young son. His blast killed 27 people, including Lindsay himself.
Hasib Hussain: the youngest of the four at 18, Hussain detonated his bomb on the top deck of a double-decker bus at 9:47 am. He lived in Leeds with his brother and sister-in-law. 14 people, including Hussain, died in the explosion in Tavistock Square.
Three of the bombers were British-born sons of Pakistani immigrants; Lindsay was a convert born in Jamaica.
Charles Clarke, Home Secretary when the attacks occurred, described the bombers as "cleanskins", a term describing them as previously unknown to authorities until they carried out their attacks.