ANKARA, March 15. /TASS/. Moscow and Ankara have achieved progress at the talks on the possible sale of Russian-made S-400 antiaircraft missile systems but the negotiations have not yet reached the stage of signing a specific deal, Turkish Defense Minister Fikri Isik said on Wednesday.

"There is progress in the talks but the sides have not yet reached the stage of putting their signatures today. The negotiations on this issue are continuing," the news agency Anadolu quoted the Turkish defense minister as saying on the possible sale of S-400 antiaircraft missile systems.

Kremlin spokesman Dmitry Peskov confirmed to Izvestia daily earlier on Wednesday that Russian President Vladimir Putin and Turkish President Tayyip Erdogan discussed during their talks in Moscow last week the possibility of delivering S-400 systems to Turkey.