Russian fighter jets will now accompany all of Moscow's missions against Islamic State targets in Syria, the General Staff said. Prior to Tuesday's attack, Russian bombers were conducting their missions without air cover.
Turkish warplanes shot down a Russian Su-24M bomber aircraft that Turkey said had violated its airspace. Both pilots ejected, and one was fatally shot while parachuting to the ground, the Russian Defense Ministry later confirmed.
Moscow has insisted its aircraft was not in Turkish airspace and posed no threat. The Russian Defense Ministry has suspended military contact with Turkey over the plane downing, which President Vladimir Putin called "a stab in the back."
Later Tuesday, a Russian Mi-8 helicopter conducting a search-and-rescue mission for the other pilot was damaged by a rebel missile in Syria. One naval infantry soldier reportedly was killed in that attack.
The surviving crew reportedly was evacuated to the Russian base at Hmeymim, Syria.
Lieutenant General Sergei Rudskoi, a spokesman for the General Staff, released a statement, saying in part:
"The General Staff is currently working out additional measures to ensure the security of the Russian air base. First: all actions of strike aircraft will be carried out only under cover of fighter planes. Second: measures will be taken to strengthen defense. To this end, the cruiser Moskva, equipped with Fort air defense system, similar to S-300, will assume position in the coastal region of Latakia. We caution that any targets, representing a potential danger for us, will be destroyed. Third: Contacts with Turkey on military lines will be discontinued."
Russia took the neglected Hmeymim Air Base in Latakia – just 30 miles from the Turkish border – and transformed it into the strategic center of Moscow's military operation against the Islamic State. The base houses hundreds of military personnel and has bays for more than 50 aircraft.