The Australian Government is expelling two Russian diplomats it believes are undeclared spies, joining world powers in taking action over the Skripal affair.
The officials will have to leave the country within seven days, Prime Minister Malcolm Turnbull and Foreign Minister Julie Bishop said.
The UK, United States and European allies of Britain have expelled 100 Russian diplomats over the nerve agent attack on former spy Sergei Skripal and his daughter Yulia in Salisbury, the biggest expulsion since the Cold War.
Turnbull and Bishop said the UK Government advised Australia the substance used in the attack was a military-grade nerve agent of a type developed by Russia. "Such an attack cannot be tolerated by any sovereign nation," they said.
"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."