Government of Russia

Russian-Turkish cooperation has reached "a strategic level," Russian President Vladimir Putin said on July 3.       

Russia will make first delivery of the S-400 missile systems to Turkey in July, Russian news agencies cited the head of Russian state arms exporter Rosoboronexport saying on Wednesday, in accordance with the earlier-stated plans.
"We are making first delivery in July as part of out plans," Alexander Mikheev is quoted as saying by RIA news agency.

All preliminary measures for the delivery of Russian S-400 missile defense systems to Turkey are complete, the head of Russia's arms export company Rosoboronexport said on June 26.       

Defense Minister Evangelos Apostolakis expressed concern Thursday over Turkey's destabilizing role in the region.

The delivery of S-400 missile defense systems to Turkey is going according to schedule, Kremlin spokesman Dmitry Peskov said on Wednesday, according to a report in Turkey's Anadolu state news agency.
"The delivery will be carried out earlier than originally planned, at the request of the Turkish side," Peskov was quoted as saying during a visit to Kazakhstan.

Russia's Federal Security Service, FSB, has warned about this.

US Secretary of State Mike Pompeo said this on Tuesday in a conversation with hiss Russian counterpart Sergei Lavrov.

U.S. Secretary of State Mike Pompeo will cancel the Moscow leg of his Russia trip, but will meet President Vladimir Putin and Foreign Minister Sergei Lavrov in the Black Sea resort of Sochi as planned on May 14, a State Department official said.

Russia will start delivering its S-400 missile defense systems to Turkey in July, Russian state arms exporter Rosoboronexport head Alexander Mikheev said April 24, according to Interfax news agency.

Russian Foreign Minister Sergei Lavrov said this in Moscow after his meeting with Serbian counterpart Ivica Dacic, adding that the West also needs to force Pristina leaders to stop with provocations and confrontational policy aimed against Belgrade.