7 July 2005 London bombings
A third bomb went off on a Underground train going south from King's Cross St Pancras to Russell Square. The bomb exploded about a minute after the train had left King's Cross, by which time it had gone about 500yards (450m) from the station. The explosion happened behind the first carriage of the train, causing a lot of damage to the back of the carriage as well as the front of the second one. The surrounding tunnel was also damaged.