Two ground-to-air missiles were fired at a Russian passenger plane while it was flying over Syria this morning, according to Russia's Interfax news agency.
The chartered Nordwind Airlines plane had at least 159 passengers on board when the missiles were fired by "unidentified forces", an unnamed source in Moscow was quoted as saying.
The missiles "exploded in the air very close to a civilian aircraft belonging to a Russian airline", the source continued.
The plane was reportedly en route to Kazan in the Russian republic of Tatarstan from Sharm el-Sheikh in Egypt.
Russia Today quoted the Federal Agency for Tourism as saying, "No one was injured and the plane was not damaged. The aircraft landed in Kazan as it had been planned".
A Russian Foreign Ministry spokesman said it is taking "emergency measures to clarify all the circumstances of this situation".