Mobiles used in high-tech terror
Mobile phones are in the hands of millions of people around the world. And increasingly, it appears, in the hands of terrorists.
The bombers who targeted commuter trains in Madrid on March 11 used the built-in alarm clock in mobile phones to set off explosives.
In Jerusalem, it is believed a call to a cell phone in a rucksack set off a bomb at Hebrew University in 2002, killing seven.
One of the Bali bombs outside the Sari nightclub in October 2002 had a cell phone attached, as did a car bomb which killed 12 people at the Jakarta Marriott hotel last August.
David Claridge, of the Risk Advisory Group, said: "Mobile phones are relatively cheap, you can acquire them in relatively large numbers and you can build a whole stack of them at one time and place them and set them off at your leisure.
"It means that you can step away some considerable distance, the other side of the world, in order to initiate the explosive device."