Russia says it's deploying anti-aircraft missiles to Syria

 (CNN)Tensions in the Middle East have escalated after Turkey shot down a Russian warplane, with the Turkish President accusing Russia of deceit and Moscow announcing it would deploy anti-aircraft missiles to Syria.

Russian Defense Minister Sergey Shoygu said Wednesday on his ministry's Twitter feed that the country would instal S-400 defense missile systems at its Hmeymim air base near Latakia, on Syria's Mediterranean coast.

The missiles have a range of 250 kilometers (155 miles), according to the missilethreat.com website. The Turkish border is less than 45 kilometers (30 miles) away.

6 photos: Turkey-Syria border: Russian warplane crashes

And Russian Foreign Minister Sergey Lavrov said Moscow has "serious doubts" that Turkey's downing of the Sukhoi Su-24 bomber near the Turkish-Syrian border Tuesday was a spur of the moment act.

"It looks very much like a planned provocation," Lavrov said.

The unusual clash between Russia and a NATO member highlights the dangerous and unpredictable nature of the Syrian war, which has drawn global powers, including the United States, into a chaotic and complex conflict.