Jamming Devices Foiled Assassination Attempt

High-tech jamming devices saved Pakistani President Pervez Musharraf from an assassination attempt, delaying by a few crucial seconds the detonation of a bomb that targeted his motorcade Sunday, intelligence officials said.

The bomb -- estimated to contain 550 pounds of explosives -- was believed to include both a remote control and a timing device to trigger it, the officials said. Jamming devices in Musharraf’s limousine stopped the timer for about a minute and jammed the remote control.

The jammers emit a magnetic impulse to block electrical frequencies used to trigger bombs. Analysts say security agencies worldwide use such equipment.