Officials: Timing Devices Discovered in London

Sources Tell ABC News Evidence of Timing Devices, Possibly Unexploded Bombs Found

In what appears to be the first major break in the London terrorist attacks, U.S. authorities tell ABC News that police in London have recovered key parts of the timing devices that set off the bombs, suggesting they were planted in packages or bags and left behind.
There also are reports that police may have discovered two unexploded bombs as they sifted through the wreckage of the four bombs that did go off. At least several dozen people were killed in the attacks, and hundreds of others were injured while traveling on subways and a double-decker bus. Scotland Yard has denied finding undetonated explosive devices in the wreckage.