The SU-30 aircraft was unable to maintain rate of climb. Followed thereafter, by inability to maintain altitude.
Attempted a restart of one of its two engines, but a delayed ignition led to accumulated fuel that burst upon ignition. But that flame pattern reduced significantly.
The aircraft decent curve increased a bit, and shortly before the aircraft exploded, one of the crew members ejected (or was ejected).
That crewmember’s parachute opened and that crewmember descended to a parking lot area. Did not learn specifics of his fate, other than he appeared to be still - on the ground.
Meanwhile, the exploded/exploding aircraft fell to the ground as well as into nearby structures.
Undesirable air-to-land interface.