Russian Ministry of Foreign Affairs said on its website on Thursday that Russia wanted its citizens not to travel to Turkey and called those living there to return back home to Russia because of a perceived "terror threat"."We recommend our citizens residing in Turkey for special reasons to return to Russia," the ministry said in a statement.On Tuesday, two Turkish F-16 fighter jets on an aerial patrol intercepted a Russian warplane within engagement rules when it intruded into Turkish airspace near the Turkey-Syria border.The intruding aircraft was warned about the violation 10 times within five minutes before it was shot down.On Nov. 25, Russian Defense Ministry confirmed that its Russian SU-24 fighter jet had been shot down, which crashed in the Syrian region of Bayirbucak close to Yayladagi district of southern Hatay province.NATO confirmed Turkey's informations about Russian jet's violation of the Turkish airspace.This was not the first time Russian fighter jets had violated Turkish airspace.In early October, Russian warplanes breached Turkish airspace for which Russian officials apologized and pledged that no such incident would be repeated.Turkey had also renewed its warning to implement engagement rules, including a military response to violations of Turkish airspace.