THE Australian government is expelling two Russian spies as part of a broad international retaliatory action against the nerve agent attack on the former Russian double agent Sergei Skripal and his daughter Yulia in Britain earlier this month. 

The diplomats have been “identified as undeclared intelligence officers” Prime Minister Malcolm Turnbull and Foreign Minister Julie Bishop said in a statement on Tuesday morning. “Undeclared intelligence agents” are spies.

More than 20 western countries, including the United States, EU countries and Canada, are expelling more than 100 Russians, in a dramatic escalation of the push against Russia. British Prime Minister Theresa May told the UK parliament this was “the largest collective expulsion of Russian intelligence officers in history”.

Turnbull and Bishop said the Russians had to leave within a week “for actions inconsistent with their status”.

“This decision reflects the shocking nature of the attack – the first offensive use of chemical weapons in Europe since World War II, involving a highly lethal substance in a populated area, endangering countless other members of the community,” they said in a statement.

“It takes into account advice from the UK Government that the substance used on 4 March was a military-grade nerve agent of a type developed by Russia. Such an attack cannot be tolerated by any sovereign nation.

“We strongly support the call on Russia to disclose the full extent of its chemical weapons program in accordance with international law.

“This attack is part of a pattern of reckless and deliberate conduct by the Russian state that constitutes a growing threat to international security, global non-proliferation rules against the use of chemical weapons, the rights of other sovereign nations and the international rules-based order that underpins them,” the statement said.

Turnbull briefed Opposition leader Bill Shorten, who immediately backed the action.

“I have spoken to the security agencies. I am very supportive of this measure,” Shorten told reporters

“These are undeclared agents and so therefore it is inappropriate that they be in Australia.”

Asked whether he believed it was beyond doubt that the Russians were involved in the nerve agent attack, Shorten said “our security agencies have that view and therefore I think this is a proportionate action today”.

Sergei and Yulia Skripal remain in a critical condition.

Michelle Grattan is a professorial fellow at the University of Canberra. This article was originally published on The Conversation.