The North Atlantic Council, the principal political decision-making body within NATO, said: “NATO Allies are deeply concerned about recent malign activities on Allied territory, including those resulting in the investigation and charging of multiple individuals in connection with hostile state activity affecting Czechia, Estonia, Germany, Latvia, Lithuania, Poland, and the United Kingdom.”

NATO allies condemned Russia’s behaviour and called on the country “to uphold its international obligations.”

The statement read: “These incidents are part of an intensifying campaign of activities which Russia continues to carry out across the Euro-Atlantic area, including on Alliance territory and through proxies.”