22 July 2005 -- British police are today searching for up to four bombers believed responsible for the second explosives attack targeting London's transportation system in two weeks.
Explosive devices were placed yesterday on three underground trains and a double-decker bus in different locations in the British capital. The near-simultaneous blasts caused severe disruptions, but no serious injuries were reported.
Reports say casualties may have been limited by the possible failure of the devices to trigger a large blast. Officials said investigators are forensically probing remains of the devices to find fingerprints or other clues that could lead to the perpetrators.
Police said they believed the intention of the devices was to kill people in a manner similar to the 7 July London attacks, which left more than 50 people dead.
There has been no claim of responsibility, and police said it is too early to tell if yesterday's events were directly linked to the 7 July attacks.