REUTERS

He also said Turkey only procures oil and gas from known sources and those who accuse it of buying from Islamic State need to prove their accusations, Reuters reports.

As reported earlier, the Russian State Duma officials accused Turkey of backing ISIS, after Turkish forces shot down one of Russia's fighter jets near its border.

Read alsoPutin calls Turkey "accomplices of terrorists" after Russian jet shot downRussian President Vladimir Putin also said that Turkey's appeal to NATO partners regarding the incident with the Russian Su-24 looked like an attempt to put the alliance at the service of the Islamic state.

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