Russian airstrikes in Syria and the Russian A321 passenger jet's crash in Egypt are two different stories and there is no need to speculate that they are related, Kremlin spokesman Dmitry Peskov said Tuesday. "Any sort of hypothetical thoughts in regard to this are completely inappropriate. Again, these are completely different stories, absolutely different issues that don't need to be connected," Peskov told journalists. Peskov said that there were different types of speculations concerning the reason of the plane crash, but the investigation into the tragedy needed to be completed before making any type of concrete conclusions. "There is a huge number of speculations on both of these [Russian airstrikes in Syria and the A321 crash]. We have said a number of times that while the investigation is ongoing, you can speculate as much as you'd like, but that doesn't mean that there is any relationship to the actual situation. As soon as the investigation begins to reveal information, it will be provided to the public." Several countries have offered their help in the investigation into the ill-fated Russian A321 passenger jet's crash over Egypt's Sinai Peninsula last weekend, Dmitry Peskov added. "A number of countries has actually offered their help in investigating the reason of this air crash, but, as you know, there are international rules...This means that participants [in the investigation] are first the country in whose airspace or territory the tragedy occurred, and the country, in this case, of citizens on the aircraft, and in this case, this is Russia," Peskov told journalists. "Any specific dates cannot be set. It's just not logically possible, therefore, of course, there is nothing to say here, no dates have been set. Dates are never set in the course of an investigation."