The Boeing 737-800 is the predecessor of the Boeing 737 MAX, the flights of which have been discontinued after two crashes prior to the current tragedy.
It was the biggest catastrophe in the history of Ukrainian aviation. 177 were people aboard the plane heading from Iranian capital to Kiev. Most of them were the citizens of Iran. Unfortunately, there were no survivors left. The crash has forced many airlines to change routes over the region.
Right now it is said that the plane was mistakenly shot down with Tor missile system.