The animal – thought to have mostly died out roughly 4,000 years ago – was apparently filmed wading through a river in the freezing wilds of Siberia.
Video: The 'woolly mammoth' aliveANIMAL previously thought extinct apparently filmed crossing icy riv
Video: The 'woolly mammoth' alive
The official was reportedly in the area surveying for a planned road.
Paranormal writer Michael Cohen said: "Rumours of a handful of mammoths still kicking around in the vast wilderness of Siberia have been circulating for decades and occasionally sightings by locals have occurred.
"Siberia is an enormous territory and much of it remains completely unexplored and untouched by humans. "