REUTERS

"The Russian defense ministry urgently summoned the Turkish embassy's military attaché to present an official protest over the actions of the Turkish air force," the ministry said, TASS reported.

A Russian Su-24 frontline bomber was downed by an air-to-air missile launched from a Turkish F-16 fighter jet when it was returning from an anti-terrorist mission to the Hmeymim airbase in Syria. The Russian side claims that the warplane was at an altitude of 6,000 meters at a distance of one kilometer from the Turkish border.

Meanwhile, Turkey's General Staff said the Russian warplane had violated its airspace and was downed by a fighter jet. According to Reuters, the Turkish military said the aircraft had been warned 10 times in the space of five minutes about violating Turkish air space. Officials said a second plane had also approached the border and been warned.

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The Russian defense ministry refuted these allegations citing objective monitoring data that "clearly demonstrated that Turkey’s airspace had not been violated."

Russian President Vladimir Putin said the downed Su-24 was no threat to Turkey as it was on a mission to bomb Islamic State targets. "It was a stab in the back," Putin said. The Russian president warned that attack on the Russian warplane would have "serious consequences" for the Russian-Turkish relations, TASS said.