Turkey and Russia have signed an accord for Moscow to supply Ankara with S-400 surface-to-air missiles, CNN Turk and other media reported on Friday, finalizing a deal the two countries have been working on for more than a year.  The S-400 deal, reportedly worth about $2.5 billion, has caused concern in the West because Turkey is a member of NATO and the system cannot be integrated into NATO’s military architecture.

It is the latest in a series of moves by Ankara to boost its defense capabilities as it faces threats from Kurdish and Islamist militants at home and conflicts across its borders in Syria and Iraq. No details of the accord were available and officials were not immediately available to comment. But Sergei Chemezov, head of the Russian state conglomerate Rostec, told the Kommersant daily on Wednesday Russia would supply Turkey with four batteries of S-400s under the deal. READ MORE