Russia says it is opposed to the potential deployment by NATO of Patriot missiles near Turkey's border with Syria.
Foreign Ministry spokesman Aleksandr Lukashevich, speaking about Turkey's request for deployment to the Western military alliance, said the move "would...not foster stability in the region."
NATO said on November 21 that Ankara had officially asked for its help in defending itself against any Syrian attacks.
In a statement, NATO Secretary-General Anders Fogh Rasmussen said the alliance would discuss the request "without delay."
Within NATO, only the United States, Germany, and the Netherlands have Patriot missile systems in their arsenals.
A NATO team is due in Turkey next week to conduct a site-survey for the possible deployment.
Based on reporting by Reuters and Interfax