(CNN)Here's a look at what you need to know about the unsuccessful terrorist bombings on July 21, 2005 in London. No one was killed or injured in the attacks.
The attacks took place two weeks after a similar attack killed 52 people and injured more than 700.
July 21, 2005 - Four bombing incidents in London take place almost simultaneously, three on subway trains, one on a bus. Small blasts occur at Warren Street, Oval and Shepherd's Bush stations. Scotland Yard also responds to an "incident" on a bus at Hackney and Columbia Road in east London. There are no casualties.