Russian Foreign Minister Sergei Lavrov yesterday said that Moscow and Ankara's military cooperation would not be deterred by US sanctions on Turkey for acquiring a Russian missile defence system. Washington this month punished Turkey for buying Russia's S-400 air defence system, imposing rare sanctions against a Nato ally. US Secretary of State Mike Pompeo at the time told Turkish Foreign Minister Mevlut Cavusoglu that the American sanctions were intended to prevent Russia from receiving substantial revenues from the sale. On Tuesday, Cavusoglu visited Moscow for talks with his Russia's top diplomat Lavrov, who told reporters that, "we have confirmed our mutual intention to develop military ties with Turkey". Cavusoglu said the US sanctions against Turkey were "an act of aggression against our country's sovereign rights," adding that Ankara would not give in to pressure.