27.07.09 JI bomb-maker linked to southern militants
Insurgents add to their arsenal of weapons
Militants in the South are believed to be
receiving training in bomb-making from the notorious Jemaah Islamiyah
terrorist group active in Indonesia, a security source says.
The source said a key member of JI believed to be linked to the July
17 bombings of the JW Marriott and Ritz-Carlton hotels in Jakarta was
providing the southern militants with the bomb-making training.
He also said radios, rather than mobile phones, were being used to
detonate bombs - a method devised to avoid detection by authorities'
efforts to track phone signals.
Southern insurgents have embraced transceiver technology in their bomb attacks, a technique found to be common in the Iraq war.
Radio transceivers are known to have triggered recent bombings in
the far South. They make for a more efficient trigger device than
mobile phones because authorities cannot interfere with the signals.
A bomb attack in Yala's Yaha district on July 17, which killed two
soldiers and wounded five people, is believed to have been detonated by
a transceiver, said Khunying Porntip Rojanasunan, director of the
Central Institute of Forensic Science.
The insurgents have also produced home-made grenades which they hurl into crowds.
One bizarre device they have invented is a fake boundary marker
stuffed with explosives which mostly targets authorities on patrol duty.
Khunying Porntip said the militants usually destroy the real markers
and replace them with fakes. The bomb inside is triggered by a mobile
phone or is wired to a timer.
She said authorities should coordinate intelligence information and keep abreast of new forms of attacks.
Col Tawisak Jantrasin, head of the army's explosive ordnance
disposal unit, said the use of transceivers to launch attacks was not
new. It has been absent from the attack scenes for a long time. But the
Yaha assault confirmed the device had made a comeback and this time the
transceiver-detonated explosion had been a lot harder to foil.
A bomb expert in the far South, who requested anonymity, believed
the transceiver operates with a ''dual tone multi-frequency'', the same
communication frequency used by bombers in Iraq and Afghanistan.
Transceivers are more efficient than mobile phones as they can be
used from a far greater distance and their signals cannot be cut by
authorities.
An investigation into the Yaha case found the attacker keyed in a
code in his transceiver to detonate the bombs, which were hidden in two
cooking gas cylinders weighing about 15 kilogrammes.
The cylinders were placed in a pickup truck, he said.
A single transceiver could also detonate many bombs at the same time, the source said.
Security forces are wary of being lured to a blast scene and walking into a trap in which insurgents trigger a second bomb.
Explosive-stuffed fake boundary markers are often secondary bombs.
Col Tawisak has told security personnel to be vigilant, although there have been fewer bomb attacks this year
Source: Bangkok Post, 27.07.09
http://www.bangkokpost.com/news/local/20995/ji-bomb-maker-linked-to-southern-militants
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