The United States urged its NATO ally Turkey to "unify the deal" with Russia's defense industry. This was said by Derzhdepu representative Ned Price at a briefing in Washington.

"We have consistently voiced that Russia's brutal and unjustified war against Ukraine makes it vitally important, in some senses now more than any other country, that all countries uniquely operate with Russia's defense sector. This puts them at risk of sanctions," Price said.

On Tuesday, the Russian news agency TARS reported that Moscow and Ankara signed a contract for the supply of another batch of S-400 surface-to-air missile systems. The Turkish side did not confirm the signing of the document.

Price did not say whether the delivery of the second batch of S-400 missile systems was approved by the Biden administration to review the plans for the sale of F-16 military aircraft to Turkey.