Russia did not explicitly take responsibility for the crash amid speculation that its air defence system downed the plane.
The airline, however, did not provide further details about the nature of the physical and technical interference.
The plane, operating as flight J2-8243, departed from Baku, Azerbaijan, at 03:55 GMT, heading to Grozny, Russia.
Mr Onuigbo called for more support from the National Council on Climate Change.
The UN chief urged world leaders to take steps to cut emissions in response to the “masterclass in climate destruction” that the world witnessed in 2024.
“We cannot leave Baku without a substantial outcome,” he said, challenging delegates to “stand and deliver.”
Representatives from almost 200 states are attending the summit, known as COP29, in Azerbaijan’s capital, Baku, which got underway on Monday.
Mr Stiell demonstrated the need for countries to collaborate while working earnestly towards newer ways of realising climate finance.
C3S said from January to October, the average global temperature had been so high that 2024 was sure to be the world’s hottest year.
According to the expert, the return of Mr Trump to the White House might discourage countries like China from committing financially to the efforts.
