More on the bombers at this BBC website. Some initial reports:
*All four suspects are British nationals.
*Three of the four are from West Yorkshire
* All four were captured on CCTV at King's Cross station, wearing rucksacks, shortly before 0830 BST on the morning of the attacks. The footage was found on Monday night
* One suspect was reported missing by his family. Some of his belongings were found on the No 30 bus in Tavistock Square
* Property linked to a second man was found at the scene of the Aldgate/Liverpool Street bomb
* Items belonging to a third suspect were found at the site of the Aldgate/Liverpool Street and Edgware Road bombs
* It is very likely the three men whose belongings were found at the bomb scenes are dead, police sources say
* Questions remain over the identity of the fourth bomber. Police do not know if he was killed at King's Cross or has fled
* One man has been arrested in West Yorkshire and is being questioned in London. He is believed to be related to one of the suspected bombers.
