Australia disrupts plot to ‘bring down plane’
CANBERRA (AP) — Police disrupted the first alleged plot in Australia to bring down an airplane and arrested four men in raids on Sydney homes, officials said yesterday.
Prime Minister Malcolm Turnbull said that security has been increased at Sydney Airport since Thursday because of the plot.
The increased security measures were also extended to all major international and domestic terminals around Australia overnight.
”I can report last night that there has been a major joint counterterrorism operation to disrupt a terrorist plot to bring down an airplane,” Turnbull told reporters. “The operation is continuing.”
Australian Federal Police Commissioner Andrew Colvin said details were scant on the specifics of the attack, the location and timing.
”In recent days, law enforcement has been aware of information that suggested some people in Sydney were planning to commit a terrorist attack using an improvised devise,” Colvin said.
Deakin University security expert Greg Barton said the first plot to target aircraft in Australia, which is the highest aspiration of many extremists, was a “pretty big threshold moment.”
The plotters were apparently making a peroxide-based explosive device rather than using nitrate-based chemicals that can be detected by airport security swab tests, Barton said.
Manchester Arena bomber Salman Abedi used such a peroxide-based explosive, triacetone triperoxide, better known as TATP, to kill 22 concert-goers in Britain on May 22.
”TATP’s called Mother of Satan because it often kills the bomb maker because it’s very unstable as it’s mixed,” Barton said. “But if it’s mixed well, it can be very potent and a small amount can be enough to bring an aircraft down if it’s done very, very expertly.”
The plan most likely was to take the explosive on board in carry-on luggage unless there was a baggage handler involved who could ensure that a stowed bomb exploded near the fuselage where it would be most damaging.
”The speculation is that the bombers would like to put it in carry-on luggage so they can be sure of getting it placed near the fuselage skin,” Barton said, adding however that putting something in a suitcase is “a lottery whether it ends up near the outside of the luggage hold or packed near the middle.”
There was no evidence that airport security had been compromised, Colvin said.