One of the world ' s most volatile regions was roiled further Tuesday when Turkey shot down a Russian warplane near the Turkish - Syrian border. Turkey said it hit the plane after it violated Turkey ' s airspace and ignored 10 warnings. One of the two pilots was killed in the air by fire from the ground, according to Russia's state-run news agency RIA Novosti. The fate of the second pilot wasn't disclosed. Meanwhile, a Russian marine was killed on Tuesday during an operation to rescue the two pilots, who were flying a Su-24 warplane in a combat sortie. Turkey and Russia exchanged bellicose language after the downing of the plane, raising fears in the international community that the Syrian conflict could spiral into something wider. The Russian plane was dealt with because it "did not answer our warning," Turkish President Recep Tayyip Erdogan said Tuesday. Erdogan said the plane incident was not something Turkey wanted to see happen, and "this does not indicate any animosity" toward any country. He added the downed jet was "one of two" planes but didn't elaborate beyond that. Putin calls jet's downing 'stab in the back'; Turkey says warning ignored Russian President Vladimir Putin said the downing of the plane would have "serious consequences for Russia's relationship with Turkey." The shooting of the plane, Putin said, "represents a stab in the back by the terrorists' accomplices. I can't describe what has happened today in any other way. Our plane was downed over Syrian territory by an air-to-air missile from a Turkish F-16 jet. "The plane fell on Syrian territory 4 kilometers (2.5 miles) away from the Turkish border. It was flying 1 kilometer away from the Turkish border when it was attacked. In any case, neither our pilots nor our jet posed any threat to Turkey. That is obvious. They were carrying out an operation fighting against ISIL in Northern Latakia." (ISIL is another acronym for ISIS.)