"So far, we have not heard the reason for the crash of our attack aircraft from the Defense Ministry. We know for sure that the aircraft was in Syrian airspace, over the territory of Syria," Peskov said, noting that the ministry's first statement on the crash was based on preliminary information.

The spokesman reaffirmed that the jet was in Syrian airspace ahead of the crash, as previously stated by Russia's Defense Ministry, and called for patience until the exact reason for the incident was established.

"It would be wrong to make some kind of assumptions right now, to make any statements until we have the complete picture. Therefore, we just have to be patient. This is a very serious incident, but again, it is impossible to say anything without complete information," he added.

Russian President Vladimir Putin could make a comment on the crash of a Russian Su-24 bomber jet in Syria at Tuesday's meeting with King Abdullah of Jordan, Kremlin spokesman Dmitry Peskov said.

"It can be assumed that the president… will touch upon this issue during the talk with the king, and that there will be some kind of a reaction," Peskov told reporters when asked whether Putin would make a statement on the matter.