Australia's government on Thursday faced angry demands to name a "traitor" former politician accused by the country's top spy of having "sold out" the country to a foreign power.
In an extraordinary public revelation, Australia's director-general of security Mike Burgess said a spy team from an unnamed country had cultivated and recruited a former Australian politician.
"This politician sold out their country, party and former colleagues to advance the interests of the foreign regime," the spy chief said in a speech in Canberra on Wednesday.
The unnamed former politician had been recruited "several years ago", said Burgess, who runs the Australian Security Intelligence Organisation.
The person had even proposed bringing a prime minister's family member into the "spies' orbit", a plan that did not proceed, he said.
The former politician did, however, organise an overseas conference at which spies posing as bureaucrats targeted participants for recruitment, eventually obtaining security and defence information from an academic, Burgess said.
The remarks unleashed speculation in the media and demands for the former politician to be identified.
"The trouble is, if he does not indicate the name then there is a cloud hanging over everybody else," conservative opposition leader Peter Dutton told Sydney radio station 2GB.
"If you are putting that detail out there as Mr. Burgess has done, I think it is incumbent to either give a little bit more criteria or a little bit more of a hint as to who the person might be."
Australia is a member of the Five Eyes intelligence-sharing group that includes the United States, Britain, Canada and New Zealand -- making it a juicy target for operatives from countries such as China and Russia.
Former Australian conservative treasurer Joe Hockey said all lawmakers had been tainted by the revelation.
"The former politician is a traitor," he told national broadcaster ABC.
It is "inconceivable" that the politician could be allowed to "walk off into the sunset without having their name, or their reputation revealed", he said.
Burgess's revelation had "besmirched" all politicians, said Hockey, who was also Australia's ambassador to the United States for four years until 2020.
"He should not do that if he is not going to name that person -- it's absurd, it's absolutely absurd."
Opposition foreign affairs spokesman Simon Birmingham urged the government to "provide as much clarity as possible", without demanding the person be named.
Defence Minister Richard Marles said he did not know the name of the former politician.
"I respect what ASIO have done here in terms of putting this story into the public domain but also maintaining the confidentiality of the facts around this, and there could be a whole lot of reasons why that should happen," he told reporters.
In his Canberra address, Burgess said a foreign intelligence service unit, dubbed "the A-Team" had made Australia its "priority target".
The unit had targeted Australians with access to "privileged information" on social networking sites using "false, anglicised personas" and promising cash rewards, he said.
"The spies pose as consultants, head-hunters, local government officials, academics and think tank researchers, claiming to be from fictional companies such as Data 31," he said.
"If a target takes the bait, the spies try to move the conversation onto an encrypted messaging app. A further step might involve the offer of an overseas trip to meet in person."
Burgess said he wanted to let the other country know that its spies had been rumbled and that the unit's team leader had been confronted by Australia's own spies.
"We want the A-team to know its cover is blown. We want the A-team's bosses to know its cover is blown," he said.
"If the team leader failed to report our conversation to his spymasters, he will now have to explain why he didn't, along with how ASIO knows so much about his team's operations and identities."
